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Unit - 5.4 Dispersion Of Light By A Prism PHYSICS - Unit - 5.4 Dispersion Of Light By A Prism

ICSE - STD 8 - PHYSICS (ICSE - English Medium). 30 questions in this chapter.

Question types

Unit - 5.4 Dispersion Of Light By A Prism question types

30 questions across 6 question groups — pick any mix to generate a PHYSICS paper with step-by-step answer keys.

30
Questions
6
Question groups
5
Question types
Sample Questions

Unit - 5.4 Dispersion Of Light By A Prism questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
The band of seven colours formed, when the white light splits on passing through a prism is called :
  • A
    dispersion
  • B
    refraction
  • ✓
    spectrum
  • D
    refractive index

Answer: C.

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Q 2MCQ1 Mark
The angle between two refracting surfaces of a prism is called :
  • ✓
    angle of prism
  • B
    angle of deviation
  • C
    angle of refraction
  • D
    none of these

Answer: A.

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Q 3MCQ1 Mark
When the refraction takes place through an equilateral prism:
  • A
    ∠A + ∠i = ∠D + ∠e
  • B
    ∠A + ∠e = ∠D + ∠i
  • ✓
    ∠A + ∠D = ∠i + ∠e
  • D
    none of these

Answer: C.

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Q 4MCQ1 Mark
During dispersion of light, the least dispersed colour is :
  • A
    violet
  • B
    green
  • C
    yellow
  • ✓
    red

Answer: D.

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Q 5MCQ1 Mark
When the white light is passed through an equilateral prism it splits into seven colours. The phenomena of splitting of white light is called :
  • A
    refraction
  • B
    spectrum
  • ✓
    dispersion
  • D
    none of these

Answer: C.

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Q 12[2 Mark Question Answer]2 Marks
Draw a neat diagram for the passage of a ray of light through an equilateral glass prism, showing clearly (a) angle of incidence (b) angle of emergence (c) angle of deviation (d) angle of prism.
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Q 17fill in the blanks.1 Mark
(prism, deviation)
The angle between the incident ray and emergent ray, when the ray is passing through an equilateral prism is called angle of __________ .
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Q 19fill in the blanks.1 Mark
(base, dispersion)
The phenomenon due to which white light splits up into seven colours, on passing through an equilateral prism is called __________ of light.
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Q 26Match the following.5 Marks

Column A

Column B

1. A transparent piece of glass used for the dispersion of white light.

(a) Angle of prism

2. The angle between incident ray and emergent ray, when refraction takes place through a prism.

(b) Spectrum

3. The angle between two refracting surfaces of a prism.

(c) Dispersion

4. A band of colours formed on the screen when white light passes through prism.

(d) Prism

5. The phenomenon due to which white light splits into seven colours on passing through the prism.

(e) Angle of deviation

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