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A student focussed the Sun rays using an optical device'X'on a screen S as shown.

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asked Mar 24, 2018 in Science by Golu (37,045 points) ● 19 ● 174 ● 627

A student focussed the Sun rays using an optical device'X'on a screen S as shown.

What conclusion can be drawn based on this about device X ?

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answered Mar 24, 2018 by BISHNU (15,580 points) ● 4 ● 4 ● 6
Light rays from infinity are converged at the focal point of the convex lens. Therefore, the focal length of the convex lens is 20 cm.
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