What is refraction?

What is the refractive index of water?

A ray of light falls on a material body at an incident angle 60^(@) and refracted at angle 30^(@) . What is the refractive index of the material?

A ray of light falls on a material body at an incident angle of 30^(@) and refracted at angle 60^(@) . What is the refractive index of the material?

A ray of light falls on a glass slab at an incident angle of 45^(@) and refracted at angle of 30^(@) . What is the refractive index of the glass with respect to air ?

Velocity of light ray in two media A and Bare v_(1) and v_(2) respectively. What is the refractive index of A with respect to B?

Velocity of light ray in two media A and Bare v_(1) and v_(2) respectively. What is the refractive index of B with respect to A?

The speed of light in water and diamond is 2.25 xx 10^(8) m//s and 1.25 xx 10^(8) m//s respectively. What is the refractive index of : diamond w.r.t. water?

The speed of light in water and diamond is 2.25 xx 10^(8) m//s and 1.25 xx 10^(8) m//s respectively. What is the refractive index of : water w.r.t. diamond?

A layer of oil 3 cm thick is flowing on a layer of coloured wtater 5 cm thick. Refractive index of coloured water is (5)/(3) and the apparent depth of the two liquids appears to be (36)/(7) cm . What is the refractive index of oil?

A tank is filled with water to height of 12.5 cm. The apparent depth of a needl lying at the bottom of the tank is measured by a microscope to be 9.4 cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 upto the same height, by what distance would the microscope have to be moved to focus on the needle again?