Refraction through Prism

Q.

How does the angle of minimum deviation produced by a prism change with an increase in the wavelength of incident light and the refracting angle of the prism?

1. In both cases, minimum deviation increases

2. decreases, increases

3. increases, decreases

4. In both cases, minimum deviation decreases

Q.

Name three factors on which the deviation produced by a prism depends and state how does it depend on the factors stated by you.

Q. Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence, define the angle of deviation.

Q.

Question 27
Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence define the angle of deviation.

Q. If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct? A. r = v B. r > v C. r = 1/v D. r < v

Q. The minimum value of the refractive index for a ${90}^{\circ }-{45}^{\circ }-{45}^{\circ }$ prism that is used to deviate a beam by ${90}^{\circ }$ by the phenomenon of total internal reflection is ________.

1. $\sqrt{2}$
2. $2$
3. $1$
4. $0$

Q. When light passes through the prism the frequency of light changes.

1. True
2. False

Q. Explain dispersion of light through a glass prism.

Q. What are the factors on which lateral displacement through glass slab depends?

1. Thickness of block
2. The angle of incidence
3. The refractive index of glass
4. Intensity of the incident ray

Q.

The diagrams (a) and (b) in Fig. 4.34 below show the refraction of a ray of light of single colour through a prism and a parallel sided glass slab respectively.

(i) In each diagram, label the incident, refracted, emergent rays and the angle of deviation.

(ii) In what way the direction of emergent ray in the two cases differs with respect to the incident ray? Explain your answer.

Q. Which colour deviates the most through a prism?

1. Red
2. Green
3. Yellow
4. Violet

Q. In case of minimum deviation, the ray inside a equilateral prism is parallel to its base.

1. True
2. False

Q. A prism with a greater refractive index produces a lesser angle of deviation.

1. False
2. True

Q. Violet light deviates more than red light.

1. True
2. False

Q. When light passes through the prism the frequency of light changes.

1. True
2. False

Q. Arrange the following colors in the ascending order of the deviation when they are incident on a prism at the same angle of incidence.

1. Blue
2. Orange
3. Violet
4. Red
5. Green

Q. A thin prism P1 with angle 4⁰ and made from a glass of refractive index 1.54 is combined with another prism P2 made from glass of refractive index 1.72 to produce dispersion withiutdeviation . The angle of prism P2 is:-
5.33⁰/4⁰/3⁰/1.6⁰