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Physics · PYQ NEET UG 2019(1)

हिन्दी

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

  1. equal to angle of incidence
  2. \( 90^\circ \)
  3. \( 180^\circ \)
  4. \( 0^\circ \)

Correct answer · Option 2

\( 90^\circ \)

Explanation

By definition of critical angle, the angle of refraction in the second medium is \( 90^\circ \).
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