Q.No.109(a): - Which condition of material, refractive index, wave speed and wavelength must satisfy for total internal reflection?

Q.No.109(a): -  Which condition of material, refractive index, wave speed and wavelength must satisfy for total internal reflection?

Ans: - When a ray passes from two media of different refractive index. Then the medium of incoming ray must have greater refractive index than the other i.e. the medium must be denser of incoming ray. Similarly the wave speed and wavelength of incoming ray must be smaller or shorter. Furthermore total internal reflection will occur if the angle of incident is larger than or equal to critical angle.