1.

An object of 5cm, is kept at a distance of 15cm in front of a concave mirror offocal length 20cm. Find nature, position and size of image so formed

Answer»

Explanation:

It will be found to be equal to 6 CM. THUS, object is placed at a distance of 6 cm × 5 = 30 cm from the lens. A CONCAVE lens of focal length 15 cm forms an image 10 cm from the lens.



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