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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
Monochromatic light passes through a prism. Compared to that in air, inside the prism the light's
  • ✓
    speed and wavelength are different, but frequency remains same
  • B
    speed and frequency are different, but wavelength remains same
  • C
    wavelength and frequency are different, but speed remains same
  • D
    speed, wavelength and frequency are all different
✓

Answer

Correct option: A.
speed and wavelength are different, but frequency remains same
a
(a)

Frequency is a characteristics of source it does not changes during refraction process.

Inside the prism wavelength and speed are reduced than that in air.

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