![]() ![]() Can you explain the basis of the teacher’s advise? Gurmit wanted to perform Activity 16.8 using a laser torch. This end of the tube is closed by a ground glass plate. To the other end touching the mirrors plane glass plate is fixed on which broken pieces of coloured bangles are placed. One end of this tube is closed by a cardboard disc having a hole at its centre. It consists of three long and narrow strips of plane mirrors inclined at an angle of 60° to one another forming prism. Kaleidoscope is a device based on the principle of multiple reflections. (d) real, behind the mirror and of the same size as the object.ĭescribe the construction of a kaleidoscope. (c) real at the surface of the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (a) virtual, behind the mirror and enlarged. The angle of incidence is equal to the angle of reflection (d) Night birds have _ cones than rods in their eyes.Ĭhoose the correct option in Questions 7-8. (c) The size of the pupil becomes _ when you see in dim light. (b) If you touch your _ ear with a right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _ (a) A person 1 m in front of a plane mirror seems to be _ m away from his image. Incident ray, reflected ray and normal at the point of incidence lie in the same plane The incident ray, the reflected ray, the normal at the point of incidence lie in the same plane. The reflected ray of light is again seen on the page.Ĭonclusion: The sheet on the board can be considered as a plane. Now bring the folded portion back to its original position. You will observe that the reflected ray is not seen in the folded portion of the chart paper. Fold the paper which is beyond the edge of the board. Mark the incident ray, normal ray and reflected ray. Throw light from a ray box on the mirror. Place a plane mirror strip vertically to the paper using a stand. Procedure: Fix sheet of white paper, a little beyond the edge of the board. Materials Required: Plane mirror, holder, ray box, etc. The angle of incidence is equal to the angle of reflection.ĭescribe an activity to show that the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.Īctivity: To show that the incident ray, reflected ray and the normal at the point of incidence lie in the same plane.The incident ray, the normal and the reflected ray, all lie in the same plane.Regular reflection will take place because the surface is smooth and plane.Diffused reflection will take place because the surface is rough.Regular reflection will take place because the surface is plane and polished.Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. No, diffuse reflection doesn’t mean the failure of laws of reflection. (iii) Reflected rays are scattered in different directions. (iii) Reflected rays are in one direction. (ii) It occurs on a smooth and polished surface. Does diffused reflection mean the failure of the laws of reflection? We can see the objects outside the room, because out of the room the light is available and the rays of light can enter our eyes after reflection from the objects.ĭifferentiate between regular and diffused reflection. When we are in a dark room then we cannot see objects in the room. Can you see objects in the room? Can you see objects out¬side the room? Explain. Light Class 8 Science NCERT Textbook Questions Visually Impaired Persons Can Read and Write ![]() Topics and Sub Topics in Class 8 Science Chapter 16 Light: Section Name NCERT Solutions for Class 8 Science Chapter 16 Light ![]()
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