One of the conditions given for minimum angle of deviation in glass prism is that the refracted ray becomes parallel to the base. So, if in any case the refracted ray is parallel to the base does it imply that it is case for minimum deviation and i = e

Q. In the minimum deviation position of a prism, the refracted ray is always parallel to its base.

Q. Assertion :If the angles of the base of the prism are equal, then in the position of minimum deviation, the refracted ray will pass parallel to the base of prism. Reason: In the case of minimum deviation, the angle of incidence is equal to the angle of emergence.

Q. In minimum deviation position, the refracted ray inside the prism is ....................... to the base.

Q. The angle of deviation through a prism is minimum when


(A) Incident ray and emergent ray are symmetric with respect to the prism.
(B) The refracted ray inside the prism becomes parallel to its base.
(C) Angle of incidence is equal to angle of emergence.
(D) When the angle of emergence is double the angle of incidence.
Choose the correct answer from the options given below:

Q. Given figure represent three cases of a ray passing through a prism of refractive angle A. The case corresponding to minimum deviation is: