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RAY OPTICS MCQs

Total Questions : 35 | Page 4 of 4 pages
Question 31. Focal length of a convex lens will be maximum for
  1.    Blue light
  2.    Yellow light
  3.    Green light
  4.    Red light
 Discuss Question
Answer: Option D. -> Red light
Question 32. A mirror used as surveillance mirrors in groceries and parking spaces
  1.    concave
  2.    convex
 Discuss Question
Answer: Option B. -> convex
Question 33. Which colour of light travels fastest in any medium except air ?
  1.    yellow
  2.    red
  3.    violet
  4.    white
 Discuss Question
Answer: Option B. -> red
Question 34. What is the relationship between angle of incidence and angle of refraction for a given pair of media ?
  1.    δ + A = i1 + i2
  2.    δ = (i1 + i2) - (r1 + r2)
  3.    μ = sin i / sin r
  4.    μ = c / v
 Discuss Question
Answer: Option C. -> μ = sin i / sin r
Question 35. Relation between wavelength and refractive index
  1.    μviolet > μred
  2.    μviolet < μred
  3.    μviolet = μred
  4.    μ has no relation with λ
 Discuss Question
Answer: Option A. -> μviolet > μred

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