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Question
State three factors on which the angle of deviation depends.
Solution
The value of the angle of deviation (or the deviation produced by a prism) depends on the following four factors:
- the angle of incidence (i),
- the material of the prism (i.e., on refractive index μ),
- the angle of prism (A),
- the colour or wavelength (λ) of light used.
RELATED QUESTIONS
The deviation produced by a prism is independent of the angle of incidence and is same for all the colours of light.
A light ray of yellow colour is incident on an equilateral glass prism at an angel of incidence equal to 48° and suffers minimum deviation by an angle of 36°.
- What will be the angle of emergence?
- If the angle of incidence is changes to (a) 30°, (b) 60°, state whether the angle of deviation will be equal to, less than or more than 36°?
A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:
What is the angle of incidence on the first face of the prism?
A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:
What will be the angle of incidence at the second face of the prism?
Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers a minimum deviation. How is the angle of emergence related to the angle of incidence in this position.
What should be the angle of incidence for a ray of light which suffers a minimum deviation of 36° through an equilateral prism?
[Hint: A = 60°, i = (A + δmin)/2]
Draw a ray diagram showing the dispersion through a prism when a narrow beam of white light is incident on one of its refracting surfaces. Also indicate the order of the colours of the spectrum obtained.
A monochromatic ray of light is incident on an equilateral prism placed at minimum deviation position with an angle of incidence 45° as shown in the diagram?
- Copy the diagram and complete the path of the ray PQ.
- State two factors on which the angle of deviation depends.
White light is dispersed by a prism. Inside the prism, compared to the blue light, the red light ______.
Name the colour of white light which is deviated the least on passing through a prism.
