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5. Refraction of Light
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Q10 of 284 Page 261

What is the power of a convex lens of focal length 0.25 m ?

f = 0.25 m

P = 1/f = 1/0.25 = +4 D


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Which has more power : a thick convex lens or a thin convex lens, made of the same glass ? Give reason for your choice.

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The focal length of a convex lens is 50 cm. What is its power ?

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What is the power of a convex lens whole focal length is 80 cm ?

Questions · 284
5. Refraction of Light
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