Question

A lens X has focal length 20cm and lens Y have focal length 40cm .Which lens would you select to obtain more convergent beam of light.
Give reason.

(ANSWER IF YOU KNOW)


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Answer 1

Explanation:

A lens X which has focal length 20cm can be selected to obtain more convergent beam of light as the light does not scatter or deviates more when it passes through the lens ....

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Answer 2

Hope it's helpful pa

Study hard ✨✌

...Focal length of any lens is the point where light converges. So, if focal length is more then the lens has converged the light to a larger distance that is it has converged less. Whereas, if the focal length is less then the light is converged at a smaller distance that is converged more.So, we can affirm that lens of 20 cm should be used to converge light to a larger extent.