Reflection of light by a plane mirror pdf

Light class 8 science chapter 16 as per ncert book used in cbse and other schools. Cbse class 10 science chapter 10 light reflection and. Reflection of light and plane mirrors edusaint courses. Plane mirrors iv a corner mirror is created when two plane mirrors are connected at a 90 angle. A ray of light strikes a reflective plane surface at an angle of 42 o with the surface. Students record observations and try to write their name so it can be read in the mirror.

Therefore, the light ray will be reflected back along the same path. What is the angle of reflection of the light ray off the second mirror r1 i1. Image 1 is a single reflection image from mirror 1. A concave cylindrical mirror will focus parallel rays of light at the focal point.

When light strikes a perfectly reflecting surface, such a mirror for example, all the light. For plane mirrors, the reflected image a virtual image and object are. Light ray diagrams plane mirrors teaching resources. List four properties of the image formed by a plane mirror. These two rules of reflection are crucial for the tracing of rays when light strikes the. A general principle for light reflecting from a uniformly moving mirror. Figure 1 shows an example of reflection from a plane surface such as mirror. Ncert science class 10 chapter 10 part 2 reflection of. This is called regular reflection irregular reflection. The lesson covers the complete explanation of class 8 chapter 16 light. To verify the laws of reflection of light using a plane mirror. Ideally, a plane mirror consists of a perfectly flat surface with no distortions, and bounces 100 percent of the light that strikes it incident light back at a predictable angle.

So mirrors are polished surfaces coated with mercury such that they reflect most of the light falling on them. In the study of how light behaves, it is useful to use light rays and the fact that light travels in straight lines. Reflection of light with a plane flat mirror trace a star. A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of centre of curvature of a convex mirror is reflected back along the same path after reflection. Reflection of light on different surfaces2 x class 1chapter reflection of light on different surfaces in class 6, we have learnt about shadows and we did many experiments with light rays and also discussed the rectilinear propagation of light i. Diffuse reflection also follows this rule, but due to the roughness of the surface, the light rays are reflected in all directions figure 2b. P physics pdf reflection of light on plane surface1 slideshare. The formation of images by a plane mirror conceptual example. Reflection of light multiple choice questions and answers.

It is formed at the same distance behind the mirror as the object is in front of the mirror. When it hits an object, one that is not smooth, the rays will bounce at many different angles. Adjust the mirror carefully so that the mirror is parallel to line. Determine the image of an object placed in front of a plane mirror, using the. The angle of incidence is equal to the angle of reflection, and the incident ray, the reflected ray and the normal to the mirror at the point of incidence all lie in the same plane. Here, the angle of incidence and angle of reflection are with respect to normal to the reflective surface. Topics covered are luminous and non luminous objects, reflection, laws of reflection and characteristics of a reflector topics namely sources of light, plane mirror, spherical mirror. In this video we will learn the law of reflection and then learn how to draw a ray diagram to describe an image. Class 10 science chapter 10 light reflection and refraction. Geometric optics the use of light rays to determine the path of light when it strikes an object incident light. Chapter 7 reflection of light icse selina solutions for. A plane mirror is the kind of mirror youre probably most used to using, although if social media are any indication, selfies had largely come to replace actual mirrors early in the 21st century. As ray of light falls normally on mirror, this means that angle of incidence is 0o.

Otherwise known as specular reflection, which occurs when the beam of light falls on a regular, polished and smooth plane, such as metal or mirror, reflects light at the same angle as it is incident to the surface. Reflection of light with two plane mirrors double mirrors. Reflection of light with two plane mirrorsdouble mirrors placed at a 90degree angle a b objective science and mathematics standards materials theory when you place two plane mirrors at a 90degree angle, the image of the first mirror is reflected in the second mirror so that the reversed mirror image is reversed again, and you see a true. Ronald galli and farhang amiri weber state university, ogden, utah 844082508 received 14 september 2011. The angle of the incidence is the angle between the incident ray and the surface normal an imaginary line perpendicular to the surface. Plane mirror uses, properties, definition, focal length.

The incident ray, reflected ray and the normal all lie in the same plane. Before the mirror has rotated, the angle of incidence is. When light from an object is reflected successively from plane mirror surfaces, a rotated image is produced. Plane mirrors flat mirrors with light, if one thinks of light bouncing off an object, it travels in all directions. Applying this to triangles \pab\ and \qab\ in figure \\pageindex1\ and using basic geometry shows that they are congruent triangles. Plane mirror results angle of incidence angle of reflection part ii. The formation of images by a plane mirror your image in a flat mirror has four properties. A medium that is polished well without any irregularities on its surface will cause regular reflection of light.

The basics of reflection, some interesting problems. The incident ray, the normal to the mirror at the point of incidence, and the reflected ray, all lie in the same plane. Images formed by a plane mirror are of same shape and size as that of an object. Reflection involves a change in direction of the light ray. Place a sheet of paper on the cork board, and draw a straight line near the top of the paper. K8 students use reflection to trace patterns from a plane mirror.

From second law of reflection, we know that angle of incidence is equal to angle of reflection. Lakhmir singh physics class 10 solutions reflection of light. Light rays that fall upon a surface are called incident rays. Professionals, teachers, students and kids trivia quizzes to test your knowledge on the subject. The angle at which light strikes a plane mirror from an object.

For the spherical mirror, what is the relation between radius of curvature r and focal length f. A general principle for light reflecting from a uniformly. Example of mirror reflection from the disco ball and. The angle of incidence is equal to the angle of reflection 2. Let us begin the detailed discussion on reflection of light on plane surfaces. A child of height h is standing in front of a straight plane mirror. Reflection of light in a plane mirror the reflection take place according to the following laws of reflection of light. If the distance between paresh and his image formed by a plane mirror is 3 m, then the distance between paresh and the mirror is. But even then some light gets absorbed by the surface. Pdf contrariety in plane mirror reflections researchgate. In diffuse reflection, light is reflected in random directions. The principal axis of the mirror is a straight line drawn through the center of curvature c and the midpoint of the.

Dec 25, 2015 p physics pdf reflection of light on plane surface1 1. When it falls on a normal surface then most of the light gets absorbed. S polarization is the perpendicular polarization, and it sticks up out of the plane of incidence the plane of the interface y0 is perpendicular to this page. Difference between reflection and refraction with comparison. Mar 05, 2015 in this video we will learn the law of reflection and then learn how to draw a ray diagram to describe an image.

The laws of reflection determine the reflection of incident light rays on reflecting surfaces, like mirrors, smooth metal surfaces, and clear. These laws of reflection are applicable to all types of reflecting surfaces. Images formed by a plane mirror are always virtual. Ncert cbse solutions for class 10 science chapter 10.

Mar 01, 2014 the image formed by a plane mirror is. The figure below shows the reflection of an incident beam on a plane mirror. In this science lab, students experiment with reflection using plane mirrors. Mcq questions for class 10 science light reflection and.

Students work with a partner and complete four investigation activities. They will then discover the characteristics of images formed in a plane mirror through a laboratory investigation. The plane mirror images interactive is a skillbuilding tool that allows the user to explore the formation of images in plane mirrors. If a vector in the object plane makes an angle, 90. The reflection of light from a plane mirror can be summarised by the following laws.

Jan 07, 2020 class 10 science mcqs chapter 10 light reflection and refraction. A plane mirror which is a highly polished surface reflects the light on it. From this, we know that the triangles created by the light rays. You only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. Reflection of light with a plane flat mirror trace a star 129kb pdf. Images in a plane mirror are the same size as the object, are located behind the mirror. The angle of incidence is equal to the angle of reflection. Different cases of reflection and image formation in plane mirror. Advanced knowledge of reflection of light through plane mirror. Minimum height of a plane mirror to see the image of a given object example. Students write their names and hold them up to the mirror. The principal focus of a concave mirror is a point f on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror. Pdf plane mirror in geogebra laboratory researchgate. Multiple reflections a person is sitting in front of two mirrors that intersect at a right angle.

A ray of light is incident on a plane mirror at an. A plane mirror is a mirror with a flat reflective surface. When a ray of light strikes a plane mirror, the light ray reflects off the mirror. The incident ray, the reflected ray and the normal at the point of incidence, lie in the same plane. Image 2 is a single reflection image from mirror 2. Class 10 reflection of light test paper with solutions. A ray of light is the straight line along which the light traveled and a bundle of light rays is called a beam of light.

Notes on reflection of light at plane surface grade 11. Light reflection and refraction class 10 mcq with answers pdf question 1. Reflection of light from a plane mirror when a ray of light ao falls on a plane mirror at the point o then it gets reflected by the. We see various objects with our eyes but our eyes only cannot help to see things only when light coming reflection of light and plane mirrors read more.

Selina concise physics class 9 icse solutions reflection. A concave mirror produces three times magnified enlarged real image of an object placed at 10 cm in front of it. Dec 05, 2017 in the study of light, something we potentially take for granted every day, reflection is the change in direction of a wavefront at an interface between two different media so that it returns into the medium where it originated. When a light ray strikes a plane mirror, the light ray reflects off the mirror. The law of reflection tells us that the angle of incidence is the same as the angle of reflection. A 4 x 107 to 8 x 107 m b 4 x 109 to 8 x 109 m c 4 x 105 to 8 x 105 m d 4 x 106 to 8 x 106 m. When light strikes a perfectly reflecting surface, such a mirror for example, all the light energy is reflected. The distance between the object and image will be a 0. When light strikes the boundary between two media, three things may happen. The phenomenon of coming back to the light in the same medium when it falls on a surface is known as the reflection of light. It makes a wonderful complement to lab activities on the law of reflection and the characteristics of plane mirror images. Now based on the type of reflecting surface we can classify mirrors as concave, convex or plane mirror.

Reflection of light at plane surface light rays are basically wave motions and they are capable of being reflected by an interface in between two mediums. Plane mirror a mirror is an object with smooth surface producing specular reflection of light a plane mirror is a mirror with a flat reflective surface image of a point image of a point due to the similarity of the triangles on the diagram, all the reflected rays extend backward to one point. If a parallel beam of light is incident on a plane mirror, the reflected beam is also parallel and it is in a fixed direction. P physics pdf reflection of light on plane surface1. Two convenient rays that are chosen to construct the image by a spherical mirror for a given object. How can we describe the images formed by plane mirrors. Light reflection and refraction 161 let us recall these laws i the angle of incidence is equal to the angle of reflection, and ii the incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane. Students will consider everyday examples of reflection to determine the law of reflection. It reflects off the second mirror and exits the system what will the angle of reflection be at the second reflection.

Consider a planemirror and a fixed incident ray of light reflecting from the surface at an angle. What is the minimum height of the mirror, and how close must its lower edge be to the floor, if she is to be able to see her whole body. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. Suppose three planes meet at a single point and that one side of each plane is designated as the reflecting side. Physics d reflection and plane mirrors science 21 phys d reflection p68 lesson 3 reflection and plane mirrors. Here, the plane of incidence z0 is the plane of the diagram. Students use reflection to trace patterns from a plane mirror. In this lab, you will study reflection of light from different mirrors. The law of reflection applies, just as it does for a plane mirror, i. Mirror, mirror on the wall eight lessons on mirrors. Pdf the purpose of this chapter is to show how an analysis of the perception of.

The interactive takes a tutorial approach to these topics. A ray of light strikes a reflective plane surface at. The angle of incidence i is equal to the angle of reflection r 2. However,irregular surfaces also do the same and it is called irregular reflection. Learn more about the laws of reflection of light in detail. When a light ray is incident on a plane mirror at angle. Given a single plane mirror, the differences between real and reflected bodies fall. Reflection of light at plane surface physics special. Kinds of reflection regular reflection regular reflection occurs when a beam of light falls on a smooth and polished surface such as a plane mirror. Students experiment with reflection to trace patterns. The convention used to express the direction of a light ray is to indicate the angle which the light ray makes with a normal line drawn to the surface of the mirror. Class 10th ncert physics light reflection and refraction reflection of light and plane mirrors lesson progress 0% complete light light is a form of energy light allows us to see different things around us.

The process of sending back the light rays after falling on the shining surface of an object is called reflection of light. A real b real and erect c real and of same size d laterally inverted. The focal length is the distance from the focal point to the center of the mirror surface. Reflection of light from a plane mirror is regular reflection and reflection of light from plane sheet of paper is irregular reflection of light. When a ray of light falls on a polished and shining surface of an object, then it is sent back in the same medium.

When light falls on a smooth polished surface, it gets reflected in a definite direction. The information in this document was accurate as of the original publication date. The reflection of a planepolarized wave on a moving mirror is associated with the aberration of light effect. An equation is derived and tabulated values presented. When a light ray strikes a surface separating two media with different optical properties, part of the light energy is reflected back to the media where it coming from. Set up the plane mirror in its holder on the mirror line so that the actual mirror surface is on the line.

Perform simple constructions, measurements and calculations based on reflections in plane mirrors the light ray that hits the mirror from the object is called the incident ray ray of incidence and the ray that is reflected off the mirror into our eyes is called the reflected ray ray of reflection. May 12, 2019 worksheet 3 pages and homework 1 page with answers for mirror diagrams, including the law of reflection angles of incidence and reflection equal, and the concept of virtual images. The radius of curvature of the mirror is twice the focal length. Reflection plane mirrors you will find details of reflection in the 1114 section of the site but some basic facts will be summarised here with a few more advanced topics. The height of the father is double the height of the child. I am not able to understand that if both are reflecting surafces why does a plane mirror form an image but a rough surface doesa not.

We can predict where the incident light ray will go after reflection. Class 10 science mcqs chapter 10 light reflection and refraction. Reflection of light with a plane flat mirror trace a star 129kb pdf file. Reflection of light and image formation on a plane mirror.