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CBSE - XII Science - Physics - Ray Optics and Optical Instruments

Solve the following question:

Asked by nkrbasak 25th February 2013, 10:56 PM
Answered by Expert


P=4=1/f  in m
f=1/4  m=0.25 m
If the lens is immersed in water completely, then its f will be 4 times....from lens maker's formula putting the value of refractive index of two materials it can be easily found.
f in water=1m
P in water will be=+1D
Answered by Expert 26th February 2013, 12:37 PM

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