if the power of a lens is -4.0 d then it means that the light is a convex lens of focal length - 50 m B. convex lens of focal length is plus 50 cm C. concave lens of focal length -25 CM D. concave a lens of focal length is -25
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Answer:
option C is correct
Explanation:
as we know that whenever the value is in negative form it's a concave mirror
secondly , to find the focal length use the formula p(power of lens ) =1/f(focal length )
HOPE IT HELPS !!!
Answered by
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Power of lens is -4.0 D means:
- It is a diverging lens . That means it is a CONCAVE LENS.
- Let focal length of lens be f :
So, power -4.0 D means concave lens with focal length of -25 cm.
- OPTION C) is correct ✔️
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