The rays of light are entering from glass into glycerine. If the absolute refractive indices of glass and glycerine are 1.5 and 1.47 respectively, find the refracting index of glycerine relative to glass.

An object of height 5 cm is placed of 10cm from convex mirror of focal length 15cm.Find the position nature and size of an image.

An object of height 6 cm is placed at a distance of 15cm from concave mirror of focal length 10cm.Find the position nature and height of an image.

The refractive index of light entering glass from water is 1.12. Find absolute refractive index of water if the absolute refractive index of glass is 1.5.

When the light entering from glass to water, refractive index of water with respect to glass is 0.9.The angle of incidence at the surface separating two media is 26^o48’.Find the angle of refraction at the surface.

Take sin 26^o48’ = 0.45 approximately.