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What will happen when a white light ray is incident on a thin oil film?

  1. Interference
  2. Multiple reflection and refraction
  3. Both (1) and (2)
  4. Can’t say

Answer (Detailed Solution Below)

Option 3 : Both (1) and (2)
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Detailed Solution

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CONCEPT:

  • Interference: When two light sources from different coherent sources meet together, then there is a distribution of energy is disturbed by each other this superposition of two light waves is called Interference of light waves.
  • Multiple reflection and refractions: When a single light goes through multiple refraction and some part of it goes for reflection continuously.

EXPLANATION:

  • When light fall on oil film it goes for numerous reflection and refraction.
  • In thin Film, interference takes place between the waves reflected from its two surface and waves refracted through it.
  • This numerous interference of light gives multiple colour in oil film. Thus option 3 is correct.

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