The focal length of the given lens is 50 cm. Its power will be
(A) -2D
(B) +2D
(C) -0.2D
(D)+0.2D
Answers
Answered by
0
Answer:
What is the power of lens of focal length 50 cm? The power of the lens is always given as the reciprocal of focal length. For the focal length of 50 cm, the power is given as
Power = 1/focal length = 1/(50 x 10-2)m
= 100/50 = 2 dioptre.
The SI unit of power is dioptre.
Answered by
0
Answer:
focal length=50cm
power =100/f
=100/50
p= 2D
hence, option B is correct
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