Copy the diagram given below and complete the path of light ray till it emerges out of the prism. The critical angle of glass is 42o. In your diagram mark the angles wherever necessary.
The diagram is shown. The ray PQ enters the prism from the side AB, its angle of incidence is 0°. Thus it does not undergo any refraction. Its angle of refraction is also 0°. When this light ray reaches the base of the prism (BC), its angle of incidence (on the boundary BC) is 60° which is more than its critical angle (42°). Thus this incident light ray (QR) does not enter into the next medium, instead it undergoes total internal reflection. When this reflected light ray (RS) reaches the side AC, its angle of incidence is 0°. Again, it does not undergo any refraction, which causes the angle of emergence to become 0°.
The diagram given below shows a right-angled prism with a ray of light incident on the side AB. (The critical angle for glass is 42°). The path of the ray of the light ray out of the glass prism is such that the value of the angle of deviation shown by the ray is
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
(a) Complete the path of the ray till it emerges out of the slab.
(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ?
(c) Mark angle of emergence by the letter e. How are the angles i and e related ?
(d) Which two rays are parallel to each other ?
(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
In Fig. 5.40, AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
(a) Complete the path of the ray till it emerges out of the slab.
(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ?
(c) Mark angle of emergence by the letter e. How are the angles i and e related ?
(d) Which two rays are parallel to each other ?
(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.