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Ray Optics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsRay Optics1 Mark
MCQ
Ray optics fails when
  • A
    The size of the obstacle is $5 \mathrm{~cm}$
  • B
    The size of the obstacle is $3 \mathrm{~cm}$
  • ✓
    The size of the obstacle is less than the wavelength of light
  • D
    (a) and (b) both
✓

Answer

Correct option: C.
The size of the obstacle is less than the wavelength of light
Ray optics fails if the size of the object is of the order of the wavelength.

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