For a given pair of transparent media,the cri | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The critical angle $C$ is given by the formula $\sin C = \frac{1}{\mu}$,where $\mu$ is the refractive index of the denser medium with respect to t

Vedclass · Accepted Answer

Red

Vedclass · Answer

(B) The critical angle $C$ is given by the formula $\sin C = \frac{1}{\mu}$,where $\mu$ is the refractive index of the denser medium with respect to the rarer medium.Since $\mu$ is inversely proportional to the wavelength $\lambda$ (Cauchy's equation),the refractive index is minimum for the colour with the longest wavelength.Red light has the longest wavelength in the visible spectrum,which results in the smallest refractive index $\mu$ for red light.Because the critical angle $C = \arcsin(1/\mu)$ is inversely related to the refractive index,the smallest $\mu$ corresponds to the maximum critical angle.Therefore,the critical angle is maximum for red light.

For a given pair of transparent media,the critical angle is maximum for which colour?

Similar Questions

$A$ ray of light is incident at an angle $i$ from a denser to a rarer medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection is $r$ and the angle of refraction is $r'$. Then the critical angle $C$ will be:

$A$ material is embedded between two glass plates. The refractive index $n$ of the material varies with thickness as shown in the figure. The maximum incident angle (in degrees) on the material for which the beam will pass through the material is

$A$ fish inside water sees the outside world through a circular horizon. If the refractive index of water is $4/3$ and the fish is $12 \, cm$ below the water surface,then the radius of this circle is $= ..... cm$.

$A$ ray of light travelling in a transparent medium of refractive index $n$ falls on a surface separating the medium from air at an angle of incidence of $45^{\circ}$. For which of the following values of $n$ can the ray undergo total internal reflection?

Assertion: The air bubble shines in water.
Reason: Air bubble in water shines due to refraction of light.

Vedclass Test Series

Exam Paper Generator

Online Exam Module