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DISPERSION OF LIGHT MCQs

Total Questions : 25 | Page 2 of 3 pages
Question 11. When light enters a medium and changes direction it is called ________
  1.    Reflection
  2.    Refraction
  3.    Dispersion
  4.    Diffraction
 Discuss Question
Answer: Option B. -> Refraction
Question 12. What is the relation between refractive index and the optical density?
  1.    More refractive index more is the density.
  2.    More refractive index less is the density
  3.    Less refractive index more is the density
  4.    No relation between refractive index and optical density
 Discuss Question
Answer: Option A. -> More refractive index more is the density.
Question 13. What do you call the phenomena which results to the formation of rainbows?
  1.    scattering
  2.    diffraction
  3.    reflection
  4.    dispersion
 Discuss Question
Answer: Option D. -> dispersion
Question 14. What is the relation between angle of incidence and angle of refraction when light goes from optically rarer to denser
  1.    Angle I is equal to angle r
  2.    Angle I is greater than angle r
  3.    Angle I is less than angle r
  4.    No relation between these angles
 Discuss Question
Answer: Option B. -> Angle I is greater than angle r
Question 15. What is the phenomenon of Dispersion?
  1.    Scattering of a spectrum
  2.    Scattering of white light
  3.    Distribution of a spectrum
  4.    Light maintaining its properties
 Discuss Question
Answer: Option A. -> Scattering of a spectrum
Question 16. Refraction of light by the earth’s atmosphere due to variation in air density is called
  1.    atmospheric reflection
  2.    atmospheric dispersion
  3.    atmospheric scattering
  4.    atmospheric refraction
 Discuss Question
Answer: Option D. -> atmospheric refraction
Question 17. When white light enters a prism, it gets split into its constituent colours
  1.    different refractive index for different wavelength of each colour
  2.    each colours has same velocity in the prism.
  3.    prism material have high density.
  4.    Scattering of light
 Discuss Question
Answer: Option A. -> different refractive index for different wavelength of each colour
Question 18. Light has the lowest velocity in which medium?flint glass n=1
  1.    diamond
  2.    water
  3.    flint glass
  4.    barium glass
 Discuss Question
Answer: Option A. -> diamond
Question 19. The splitting of white light into its constituent colours is called
  1.    refraction.
  2.    dispersion.
  3.    deviation.
  4.    displacement.
 Discuss Question
Answer: Option B. -> dispersion.
Question 20. Myopia is corrected by using spectacles with
  1.    convex lenses.
  2.    concave lenses.
  3.    glass slabs.
  4.    prisms.
 Discuss Question
Answer: Option B. -> concave lenses.

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