The focal length of a convex mirror is 25 cm. lts power will be________Dioptre.
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Answered by
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Heya,
We know that,
Focal length of a convex mirror is positive.
=> f= 25 cm = 0.25m
=> P =1/f
=> P = 1/0.25
=> P = 100/25
=> 【P = +4 D】 Answer...
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Answered by
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f=25cm to convert into meters
we have to divide by 100
therefore, 25/100 =0.25
d=1/f
therefore, d=1/0.25
d= 4
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