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Taijeshvi
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Asked: 2021-12-03T08:36:38+00:00 In:

An optical device has been given to a student and he determines its focal length by focusing the image of the sun on a screen placed 24 cm from the device on the same side as the sun. Select the correct statement about the device.

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Poll Results

7.14%[A] Convex mirror of focal length 12 cm ( 13 voters )
17.03%[B] Convex lens of focal length 24 cm ( 31 voters )
70.88%[C] Concave mirror of focal length 24 cm ( 129 voters )
4.95%[D] Convex lens of focal length 12 cm ( 9 voters )
Based On 182 Votes

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Concave mirror forms real image of distant object, the sun, at its principal focus, which is in front of the mirror. Focal length is the distance between pole of the mirror and the focus, focal length= 24 cm.

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    1. [C] Concave mirror of focal length 24 cm

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