Three glass prisms A, B and C of same refractive are placed in contact with each other as shown on Fig. 13.77 with no air gap between the prisms. A monochromatic ray of light OP passes through the prism assembly and emerges as QR. The conditions of minimum deviation are satisfied in the prisms:
Three glass prisms A, B and C of same refractive are placed in contact with each other as shown on Fig. 13.77 with no air gap between the prisms. A monochromatic ray of light OP passes through the prism assembly and emerges as QR. The conditions of minimum deviation are satisfied in the prisms:
The correct option is B A and B
The condition for minimum deviation in a prism is given as
1.
i=e
where i is the angle of incidence
and e is the angle of emergence.
2.
r1=r2
where r1 and r2 are the angle of refraction of the
two refracting surfaces of the prism.
Hence the first refracted ray inside the prism should be
parallel to the base of the prism.
In the figure we can see that the above condition is
satisfied by the prisms A and B.
Hence the correct answer is option (C).
The condition for minimum deviation in a prism is given as
1. i=e where i is the angle of incidence and e is the angle of emergence.
2. r1=r2 where r1 and r2 are the angle of refraction of the two refracting surfaces of the prism.
Hence the first refracted ray inside the prism should be parallel to the base of the prism.
In the figure we can see that the above condition is satisfied by the prisms A and B.
Hence the correct answer is option (C).
