Question

Which of these has a smaller focal length a thick lens or a thin​

Answer 1

Explanation:

Answer. In case of thick lens, the optical path length of light is more, than for a thin lens. Thus the bending of light will be more in case of a thicker lens. Hence, thicker lens has a smaller focal length.

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Answer 2

Answer:

thick lens

Explanation:

it is because of small focal length