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Light Reflection And Refraction

Question 15:

An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focused image can be obtained? Find the size and the nature of the image.

Answer:

Object distance, u = −27 cm

Object height, h = 7 cm

Focal length, f = −18 cm

According to the mirror form…

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