Physics, asked by rahul487469, 4 months ago

A doctor is advised to use -4D lens, what is its focal length

Answers

Answered by mamathark1989

0

Answer:

999.99999999.99999 u r u doing

Answered by shantanukumar9686

2

Answer:

Power of a lens is -2D, negative sign indicates it is a Concave lens. Focal length (in meters)=1/power of the lens, thus focal length=1/2=0.5m=50cm.

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