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प्रश्न
The angle of refraction in a glass block of refractive index 1.5 is 19°. Calculate the angle of incidence.
संख्यात्मक
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उत्तर
\[ \mu = \frac{\sin i}{\sin r} \]
sin i = μ × sin r
= 1.5 × sin 19°
= 1.5 × 0.3256
sin i ≈ 0.4884
i = sin−1 (0.4884)
≈ 29.2°
The angle of incidence is approximately 29.2°.
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