Which of the two has a greater power : a lens of short focal length or a lens of large focal length ?

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Solution

Power is inversely proportional to the focal length.
So a lens of short focal length has more power.

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Question 8
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Which of the two has a greater power : a lens of short focal length or a lens of large focal length ?

Power is inversely proportional to the focal length. So a lens of short focal length has more power.

Power is inversely proportional to the focal length.
So a lens of short focal length has more power.