A ray of light falls on one of the lateral surface of an equilateral glass prism placed on the horizontal surface of a table as shown in fig. 2.For minimum deviation of ray, which of the following is true?

either PQ or RS is horizontal

No worries! We‘ve got your back. Try BYJU‘S free classes today!

QR is horizontal

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

RS is horizontal

No worries! We‘ve got your back. Try BYJU‘S free classes today!

PQ is horizontal

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B QR is horizontal
In order to have a minimum deviation, the refracted ray inside the prism should be parallel to the base of the prism. Therefore QR should be parallel to the base of the prism. Since the base of the prism is horizontal, QR should be horizontal.

Suggest Corrections

Similar questions

Q. A ray of light is incident on an equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?

Q. An equilateral prism is placed on a horizontal surface. A ray

PQ

is incident on it. For minimum deviation

The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. The path of the emergent ray is such that

Q. An equilaterial prism is kept on a horizontal surface. A typical ray of light PQRS is shown in the figure. For minimum deviation

Q. A ray of light is normally incident on one face of an equilateral glass prism. Will the light ray suffer minimum deviation by the prism ?

Join BYJU'S Learning Program

A ray of light falls on one of the lateral surface of an equilateral glass prism placed on the horizontal surface of a table as shown in fig. 2.For minimum deviation of ray, which of the following is true?

The correct option is B QR is horizontalIn order to have a minimum deviation, the refracted ray inside the prism should be parallel to the base of the prism. Therefore QR should be parallel to the base of the prism. Since the base of the prism is horizontal, QR should be horizontal.

The correct option is B QR is horizontal
In order to have a minimum deviation, the refracted ray inside the prism should be parallel to the base of the prism. Therefore QR should be parallel to the base of the prism. Since the base of the prism is horizontal, QR should be horizontal.