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(i) If the lens is placed in water instead of air, how does its focal length change? (ii) Which lens, thick or thin has greater focal length? - Physics

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Question

(i) If the lens is placed in water instead of air, how does its focal length change? 
(ii) Which lens, thick or thin has greater focal length?

Short Note

Solution

(i) Focal length of lens increases.

(ii) A thin lens has greater focal length as compared to a thick lens.

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2018-2019 (March) Set 1
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