If the angle of incidence in denser medium is equal to critical angle, the angle of refraction will be:

Q. If the angle of incidence in denser median is equal to the critical angle, then the angle of refraction will be:

Q. A ray of light from a denser medium strikes a rarer medium at an angle of incidence i If the angle of reflection is $\gamma$ and the angle of refraction is ${\gamma }^{\prime }$ and the reflected and refracted rays make an angle of ${90}^o$ with each other, then the critical angle will be:

Q. A ray of light from denser medium strikes a rarer medium at angle of incidence $i$. The reflected and refracted rays make an angle of ${90}^o$ with each other. The angle of reflection and refraction are $r$ and $r^{\prime }$. The critical angle is

Q. Let the refractive index of a denser medium with respect to a rare medium be $N_{12}$ and its critical angle ${\theta }_C$ . At an angle of incidence A when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is ${90}^o$. Angle A is given by :