Science and Technology I · Textbook solutions

Refraction of Light

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 9 questions

Exercise

9 q
  1. Fill in the blanks and Explain the completed sentences.
    Ex Q1(a)
    Refractive index depends on the ……… of light.
  2. Ex Q1(b)
    The change in ……… of light rays while going from one medium to another is called refraction.
  3. Prove the following statements.
    Ex Q2(a)
    If the angle of incidence and angle of emergence of a light ray falling on a glass slab are ii and ee respectively, prove that, i=ei = e.
  4. Ex Q2(b)
    A rainbow is the combined effect of the refraction, dispersion, and total internal reflection of light.
  5. Mark the correct answer in the following questions.
    Ex Q3(A)
    What is the reason for the twinkling of stars?
    1. A.
      Explosions occurring in stars from time to time
    2. B.
      Absorption of light in the earth's atmosphere
    3. C.
      Motion of stars
    4. D.
      Changing refractive index of the atmospheric gases
  6. Ex Q3(B)
    We can see the Sun even when it is little below the horizon because of
    1. A.
      Reflection of light
    2. B.
      Refraction of light
    3. C.
      Dispersion of light
    4. D.
      Absorption of light
  7. Ex Q3(C)
    If the refractive index of glass with respect to air is 3/23/2, what is the refractive index of air with respect to glass?
    1. A.
      12\frac{1}{2}
    2. B.
      33
    3. C.
      13\frac{1}{3}
    4. D.
      23\frac{2}{3}
  8. Solve the following examples.
    Ex Q4(a)
    If the speed of light in a medium is 1.5×1081.5 \times 10^{8} m/s, what is the absolute refractive index of the medium?
  9. Ex Q4(b)
    If the absolute refractive indices of glass and water are 3/23/2 and 4/34/3 respectively, what is the refractive index of glass with respect to water?