A ray of light incident at angle of `40^(@)` , on a glass slab , is deviated through `15^(@)` , while passing through glass . What is the critical angle for the glass air surface ?

A ray of light travelling in air is incident on the surface of glass slab at an angle of 40^(@) . If the ray is deviated through 18^(@) , determine critical angle for the glass-air interface.

At the bottom of a trough filled with water a rectangular glass slab is placed. A ray of light is incident on the water surface at an angle of 30^(@) and enters the glass after passing through the water. What is the angle of refraction in glass? Given, refractive index of water is 1.33 and that of glass is 1.5.

(a) Figure below shows a parallel beam of monochromatic light incident on a convex sperical surface, radius of curvature R=30 cm, which separates glass (refractive). Find the distance of image formed. (b) A ray of light which is incident in air on the surface of a glass block is deviated through 15^(@) . The angle of incidence in air is 60^(@) . what is the angle of refraction in glass ? Also, claculate the critical angle for a glass-air interface.

A ray of light in air is incident on a glass slab at an angle of incidence of 60^(@) . When it travels through glass, it is deviated through 15^(@) . What is the refractive index of the material of the glass slab ?

The ray of light is incident at an angle of 45^(@) on a glass surface. What will be the critical angle of the glass when placed in air if the light ray is deviated by 12^(@) ?

A ray of light is incident on a glass slab at an angle of 45^(@) . If refractive index of glass be 1.6, what is the angle of refraction ?

A rectangular glass slab rests at the bottom of a trough of water. A ray of light incident on water surface at an angle of 50^(@) passes through water into glass. What is angle of refraction in glass ? Take mu for water 4//3 and mu for glass 3//2 .

A ray of light travelling from glass to air is incident at 50^(@) from the glass air boundary . What is the angle of deviation if the critical angle is 42^(@) ?