find the power of a concave lens of focal length 2 metre
find the power of a concave lens of focal length 2 metre.
Answer:
The power of a lens is defined as the reciprocal of its focal length, and is measured in diopters (D). A concave lens has a negative power.
The focal length of the concave lens is given as 2 meters. Therefore, the power of the lens can be calculated as:
Power = 1 / Focal Length
Power = 1 / (-2 m) (since the lens is concave)
Power = -0.5 D
Therefore, the power of the concave lens with a focal length of 2 meters is -0.5 diopters.