Minimum Deviation and Thin prism

A thin prism is made of a material which has a refractive index of 1.3 for red light and a refractive index of 1.5 for blue light. If the apex angle is 9∘,what is the average minimum deviation angle?

• 3.6∘

• 0.9∘

• 21.6∘

• 12.6∘

A triangular prism produces a minimum angle of deviation of light rays through it when the angle of incidence of light rays onto the prism is 48∘.The minimum angle of deviation of the prism is 30∘.What is the apex angle of the prism?

• 22

• 33

• 66

• 48

A light ray falls on one of the faces of an equilateral triangular prism at an angle of 50∘.If the refracted ray is parallel to the base of the prism, then it emerges at an angle of

• 30

• 40

• 50

• 60

If a light ray which falls on an equilateral prism undergoes minimum deviation, what is the second angle of incidence?

• 60

• 90

• 45

• 30

Use the figure to find the deviation angle.

• 40

• 50

• 70

• 80

A thin glass prism has an apex angle of 4∘.The refractive index of the glass is 1.7, so the angle of deviation equals

• 2.8

• 1.8

• 8.5

• 5.7

A triangular prism has an apex angle of 32∘.The minimum angle of deviation of the prism is 56∘.What is the angle of incidence that corresponds to this angle of deviation?

• 30

• 35

• 44

• 50

A prism with refractive index 1.3 is placed in a liquid whose refractive index is 1.1. If the apex angle of the prism is 45∘,what will the minimum angle of deviation be? Give your answer to one decimal place.

• 12.3∘

• 8.8∘

• 7.2∘

• 4.4∘