a convex lens has focal length 20cm in air. It is made of a matrial of refractive index 1.6. If it is immersed in liquid of refractive index of 1.3 what is the new focal length?

Asked by DIVYA GARG | 26th Nov, 2013, 08:21: PM

Expert Answer:

Answered by  | 27th Nov, 2013, 11:34: AM

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