a thin lens has a focal length of -25 cm .what is the power of lens ?is it convex or concave
Answers
Answered by
31
Aloha ! ✌️
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Given,
Focal length = 25 cm (Concave)
As we know ,
Power of lens = 1 / focal length (f) [in meter]
•°• Power = 100/ f [in cm ]
= 100/ 25
= 4 Dioptre
Finally ,
Power = - 4 D
Since , the power is negative .
•°• It's a concave lens .....!!
___________________________
Hope it helps you !! ☺️
_______________________________
Given,
Focal length = 25 cm (Concave)
As we know ,
Power of lens = 1 / focal length (f) [in meter]
•°• Power = 100/ f [in cm ]
= 100/ 25
= 4 Dioptre
Finally ,
Power = - 4 D
Since , the power is negative .
•°• It's a concave lens .....!!
___________________________
Hope it helps you !! ☺️
Answered by
5
Answer:
Power = 4 D
concave lens
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