Find the focal length of a lens of power -2.0D and what type of lens is this?
Answers
Answered by
56
power =-2 dioptre
focal length =-1/2 =-0.5.
The lens is concave lens.
Hope the answer helped u.
focal length =-1/2 =-0.5.
The lens is concave lens.
Hope the answer helped u.
Answered by
22
The power is negative so it means that it is concave lens.
We know that focal length is reciprocal of power in metres.
So,1/-2=f
f=-0.5metre
We know that focal length is reciprocal of power in metres.
So,1/-2=f
f=-0.5metre
Similar questions