Dispersion of Light MCQs
Dispersion of Light MCQs – CBSE Class 8 Science
Class: 8
Subject: Science
Section: Light
Topic: Dispersion of Light MCQs
Board: CBSE (Based on NCERT Syllabus)
Subject: Science
Section: Light
Topic: Dispersion of Light MCQs
Board: CBSE (Based on NCERT Syllabus)
1. Dispersion of light means:
Answer: b) Splitting of white light
Explanation: White light splits into its constituent colours when passing through a prism.
Explanation: White light splits into its constituent colours when passing through a prism.
2. Device used to show dispersion:
Answer: b) Prism
Explanation: A glass prism refracts different colours by different amounts.
Explanation: A glass prism refracts different colours by different amounts.
3. The band of colours formed is called:
Answer: b) Spectrum
Explanation: It contains seven colours.
Explanation: It contains seven colours.
4. Number of colours in spectrum:
Answer: c) 7
Explanation: VIBGYOR colours.
Explanation: VIBGYOR colours.
5. VIBGYOR stands for:
Answer: a) Colour order
Explanation: Violet to Red sequence.
Explanation: Violet to Red sequence.
6. Colour deviated most:
Answer: b) Violet
Explanation: Shortest wavelength bends most.
Explanation: Shortest wavelength bends most.
7. Colour deviated least:
Answer: b) Red
Explanation: Longest wavelength bends least.
Explanation: Longest wavelength bends least.
8. Rainbow forms due to:
Answer: b) Dispersion
Explanation: Sunlight disperses in raindrops.
Explanation: Sunlight disperses in raindrops.
9. Scientist who explained dispersion:
Answer: a) Newton
Explanation: Used prism experiment.
Explanation: Used prism experiment.
10. White light is a mixture of:
Answer: c) 7 colours
Explanation: Combined spectrum.
Explanation: Combined spectrum.
11. Sequence starts with:
Answer: b) Violet
Highest deviation.
Highest deviation.
12. Rainbow seen when Sun is:
Answer: b) Behind observer
Light enters raindrops ahead.
Light enters raindrops ahead.
13. Dispersion occurs due to:
Answer: b) Different refraction
Colours bend differently.
Colours bend differently.
14. Colour in middle:
Answer: a) Green
Central position.
Central position.
15. Prism material:
Answer: b) Glass
Transparent refracting medium.
Transparent refracting medium.
16. Sunlight appears white because:
Answer: b) Mixed colours
All spectrum colours combined.
All spectrum colours combined.
17. Artificial rainbow made using:
Answer: b) Prism
Splits white light.
Splits white light.
18. Refraction causes:
Answer: a) Dispersion
Due to bending.
Due to bending.
19. Longest wavelength colour:
Answer: c) Red
Least deviation.
Least deviation.
20. Shortest wavelength colour:
Answer: b) Violet
Most deviation.
Most deviation.
