A green light is incident from the water to t | vedclass

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(A) The critical angle $	heta_c$ is given by $\sin 	heta_c = \frac{1}{\mu}$.According to Cauchy's equation,the refractive index $\mu$ decreases as t

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The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.

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(A) The critical angle $	heta_c$ is given by $\sin 	heta_c = \frac{1}{\mu}$.According to Cauchy's equation,the refractive index $\mu$ decreases as the wavelength $\lambda$ increases,meaning $\mu$ increases as frequency $f$ increases.For green light,the incident angle is $	heta_c$. If the frequency is less than that of green light,the wavelength is greater,so the refractive index $\mu$ is smaller. Consequently,the critical angle $	heta_c = \arcsin(1/\mu)$ becomes larger than the incident angle $	heta$. Since the incident angle is now less than the critical angle,these light components will refract into the air.If the frequency is greater than that of green light,the wavelength is smaller,so the refractive index $\mu$ is larger. Consequently,the critical angle $	heta_c$ becomes smaller than the incident angle $	heta$. Since the incident angle is now greater than the critical angle,these light components will undergo total internal reflection.

$A$ green light is incident from the water to the air-water interface at the critical angle $(\theta)$. Select the correct statement.

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