what is meant by power of lens ?write is si unit ?a student uses a lens of focal length 40 cm . write a power of lens
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Power of a lens is the ability of a lens to converge or diverge light rays.
The si unit of power is dioptre.
Given: f=40cm=0.4m
P=1/f
=>p=1/0.4
therefore the power of lens is 2.5 D
The si unit of power is dioptre.
Given: f=40cm=0.4m
P=1/f
=>p=1/0.4
therefore the power of lens is 2.5 D
Answered by
7
Answer:
The power of converging and diverging light rays is called power of lens
SI unite is dioptre(D)
f=40cm
So there is formula
P=100/f (this formula is used when focal length is in cm)
P=100/40
P=10/4
P=2.5D
Explanation:
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