(A) Define refraction
(B) (i) Complete the diagram.
(ii) What is the effect on the velocity of light when it enters water ?
(iii) If the light was incident on the interface at an angle greater than critical angle, which phenomen on occurs ?

(a) Complete the diagram. (b) What is the effect on the velocity of light when it enters water ? (c ) If the light was incident on the interface at an angle greater than critical angle, which phenomen on occurs ?

When the light ray is incident normal to the interface between any two media, the angle of incidence is ___________ .

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

a.Figure shows a cross-section of a 'light pipe' made of glass fibre of refractive index 1.68 The outer converting of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections insides the pipe take place as shown in the figure. b.What is the answer if there is no outer converting of the pipe ?

The critical angle for a given piece of glass is 45^@ . Calculate the polarising angle for it. Also calculate the angle of refraction when light is incident on this glass at an angle of incident equal to i_P

When a ray of light enter from one medium to another, its velocity is doubled. The critical angle for the ray for two internal reflection will be

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