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UPSC Prelims 1991Question 133Science & Technology

The rainbow and the rainbow like colours seen on a thin film of oil on a water surface are two phenomena. They are

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  1. (a)Similar in nature and both are due to refraction of light
  2. (b)Different in nature and rainbow is due to interference of light, while colour of thin film is due to diffraction
  3. (c)Similar in nature and both are due to interference of light
  4. (d)Different in nature and rainbow is due to refraction, while colour of thin film is due to interference of light

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