Refractive index of water is 4/3 and that I the glass is 3/2 with regard to air . What s the refractive index of glass with respect to the water? What is the power of concave lens of focal length 200cm
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The refractive index of water with respect to air = 4/3 i.e. the speed of light in air/ speed of light in water = 4/3 (1) The refractive index of glass with respect to air = 3/2 i.e., speed of light in air/ speed of light in glass = 3/2 (2) By dividing equation 2 by 1, we get, The refractive index of glass with respect to water = 9/8
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