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STD 12 - 9. Ray optics abd optical instruments — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 9. Ray optics abd optical instruments4 Marks
MCQ
Light of different colours propagates through air
  • A
    With the velocity of air
  • B
    With different velocities
  • C
    With the velocity of sound
  • ✓
    Having the equal velocities
✓

Answer

Correct option: D.
Having the equal velocities
d
(d) In vacuum, the speed of light is independent of wave length.

Thus vacuum (or air) is a non dispersive medium in which all colours travel with the same speed.

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