question_answer

When light travels from one medium to the other medium of which the refractive index is different, then which of the following will change?

A)  Frequency, wavelength and velocity

B)  Frequency and wavelength

C)   Frequency and velocity

D)  Wavelength and velocity

Correct Answer: D

Solution :

                 When light travels from one medium to another, it is deviated from its path. This phenomenon is called refraction. In refraction both the speed and wavelength of the waves are changed but the frequency remains unchanged. For refractive index                 \[_{1}{{\mu }_{2}}=\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{speed\text{ }of\text{ }light\text{ }in\text{ }first\text{ }medium}{speed\text{ }of\text{ }light\text{ }in\text{ }second\text{ }medium}\]and       \[_{1}{{\mu }_{2}}=\frac{\lambda }{{{\lambda }_{m}}}\]