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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
A monochromatic beam of light passes from a denser medium into a rarer medium. As a result
  • ✓
    Its velocity increases
  • B
    Its velocity decreases
  • C
    Its frequency decreases
  • D
    Its wavelength decreases
✓

Answer

Correct option: A.
Its velocity increases
a
( a)$v \propto \frac{1}{\mu },{\mu _{rarer}} < {\mu _{denser}}$

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