Show with the help of a diagram how a total reflecting prism can be used to turn a ray of light through `90^(@)`. Name one instrument in which such a prism is used.

A total reflecting equilateral prism can be used to deviate a ray of light through :

A total reflecting right angled isosceles prism can be used to deviate a ray of light through :

What device other than a plane mirror can be used to turn a ray of light through 180^(@) ? Draw a diagram in support of your answer. Name an instrument in which this device is used.

Show with the aid of a ray diagram, how a right angled isosceles prism can be used to invert the rays. (a) How sould the rays fall on the prism ? (b) Which phenomenon is responsible for this action of prism? (c) What is the nature of the image in relation to the object ?

State one advantage of using a total reflecting prism as a reflector in place of a plane mirror.

Draw a ray diagram to show a right angled isosceles prism may be used to ''bend the path of light rays by 90^(@) . Write the necessary condition in terms of the refractive index of the material of this prism for the ray to bend to 90^(@) .

A ray of light XY passes through a right angled isosceles prism as shown below. Name the instrument where this action of prism is put into use.

A ray of light XY passes through a right angled isosceles prism as shown alongside. Name the instrument where this action of prism is put into use.

A ray of light PQ is incident normally on the hypotenuse of a right angled prism ABC as shown in the diagram given below: Name an instrument where this action of the prism is used.

A ray of light PQ is incident normally on the hypotenuse of a right angled prism ABC as shown in the diagram. Name an instrument where this action of the prism is used.