How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm and 40 cm respectively.
How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light?
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The power of a lens is related to its focal length as
P = \(\frac{1}{f}\)(in m)
More the power of a lens more is its converging power. Thus, the lens of shorter focal length will have more converging power.
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