jmohanakrishnan78 jmohanakrishnan78

09-05-2024
CBSE BOARD X

Answered

student selected the sun as a distant object to find the focal length of a concave mirror. His teacher advised him to use a screen of wood or hard cardboard. It is because (a) white paper is not available in the lab. (b) white paper is costlier than other papers (c) white paper may start burning when sun rays converge on it. (d) white paper scatters the light rays falling on it

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