मराठी

The critical angle for glass-air interface is ______. - Physics

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प्रश्न

The critical angle for glass-air interface is ______.

पर्याय

  • 24°

  • 48°

  • 42°

  • 45°

MCQ
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उत्तर

The critical angle for glass-air interface is 42°.

Explanation:

For glass,

Refractive index `"_amu_g = 3/2`

∴ sin C = `1/("_amu_g) = 2/3`

As, sin 42° = `2/3`

∴ C = 42°

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पाठ 4: Refraction of Light at Plane Surfaces - EXERCISE - 4 (D) [पृष्ठ १०२]

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सेलिना Physics [English] Class 10 ICSE
पाठ 4 Refraction of Light at Plane Surfaces
EXERCISE - 4 (D) | Q 1. | पृष्ठ १०२
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