What is the power of a concave lens of focal length 25 cm ?
Answers
Answered by
52
Answer:
P= - 4.0 D
Explanation:
Since it is a concave lens, focal length is negative.
The focal length should be in metres when you are calculating power.
f= -25cm
= -25/100
= -0.25m
P=1/f
=1/-0.25
= - 4 D
So, the answer is
power= - 4.0 dioptre (D)
Hope it is clear...
Mark it as the BRAINLIEST!!
All the BEST!!!
Similar questions