Q. Critical angle increases when

क्रांतिक कोण तब बढ़ता है जब

A
Light passes from water to glass
प्रकाश पानी से कांच तक जाता है
B
Refractive index decreases
अपवर्तनांक कम हो जाता है
C
Light moves to denser medium
प्रकाश सघन माध्यम में चला जाता है
D
Temperature drops
तापमान गिरता है

Explanation

The critical angle θc\theta_c is given by:

sin⁡θc=n2n1\sin \theta_c = \frac{n_2}{n_1}

where n1n_1 is the refractive index of the denser medium, and n2n_2 of the rarer medium. If n1n_1 decreases (the denser medium becomes less dense or refractive index decreases), the ratio n2n1\frac{n_2}{n_1} increases, so θc\theta_c increases.

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Heat Transfer Wave Nature of Light Electrostatics Ideal Gas Laws Blackbody Radiation

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