The optical paths traversed by a monochromatic of light are same while the ray either passes through a distance of 4 cm in glass or a distance of 4.5 cm in water .What is the refractive index of water if that of glass is 1.53?

When an object is placed 20 cm away from a convax lens, no image is obtained on either side of the lens. What is the focal length of the lens? If the refractive index of glass with respect to air is 1.5, what is the refractive index of air with respect to glass?

The wavelength of a monochromatic light is 4200 Å in air. What will be its wavelength when passing through water (mu_(omega) = (4)/(3)) ?

A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. By rotating the prism,the angle of minimum deviation is measured to be 40^(@) . What is the refractive index of the material of the prism? If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of light. Refracting angle of the prism is 60^(@) .

A small air bubble exists inside a transparent cube of side 15 cm each. The apparent of the bubble observed from one face is 6 cm and from the opposite face its apparent distance becomes 4 cm. Determine the real distance of the bubble from the first face and refractive index of the material of the cube.