Question

write an activity to find the principal focus of a concave mirror by obtaining the image of a far away object​

Answer 1

Explanation:

Place the screen in front of the reflecting surface of the mirror. Move the screen back and forth until a clear, sharp image of the distant object is obtained on the screen. Measure the distance between the concave mirror and the screen with a metre scale. This distance is the focal length of the given concave mirror.

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