# Light - Reflection and Refraction

Subject matter experts of JagranJosh have developed chapter wise practice questions as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Light - Reflection and Refraction” of Science.

• Q1.Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he finds that the size of his face in mirror A goes on increasing but that in mirror B remains the same:

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• Q2.A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:

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• Q3.A ray light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:

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• Q4.A candle is held 3 cm away from a concave mirror of radius of curvature 24 cm. Find the position of the image formed.

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• Q5.If an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed at a distance of 19 cm from the lens, the image formed is slightly larger than the object. The approximate focal length of the lens is:

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• Q6.A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:

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• Q7.While performing an experiment on determination of focal length of a convex lens, four students obtained the image of the same distant tree on the screen as follows:

Which diagram shows the formation of image correctly?

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