An optician prescribes a power = -0.5 dioptre. The corresponding lens must be _________ lens of focal length ________ metre
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Answered by
2
Power is negative for concave lens because the focal length is negative for the same.
Hence, the lens is concave.
We know:
P = 100
-------
f
f = 100 = 200 cm.
-------
-0.5
Hence, the lens is concave.
We know:
P = 100
-------
f
f = 100 = 200 cm.
-------
-0.5
cpadith:
it is so helpful. i was in doubt how to determine the lens....
I'm really glad that it helped you :D
Answered by
2
The corresponding lens must be Concave lens of focal length 2 meter .
Power = 1/ focal length
Power = 1/ focal length
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