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Standard IX
Science
Question

Total internal reflection takes place when light is incident
  1. From air on a plane glass surface at a certain given angle
  2. On a concave mirror
  3. From air on a plane surface at any angle
  4. From inside a glass placed in water at a certain given angle

A
On a concave mirror
B
From air on a plane glass surface at a certain given angle
C
From air on a plane surface at any angle
D
From inside a glass placed in water at a certain given angle
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Solution
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Total internal reflection takes place when light is incident from inside a glass placed in water at a certain given angle.

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