Question

State whether the following statement is True or False.

Lights of all color travel at the same speed through any transparent medium.

• A. True
• B. False

Answer 1

Answer: (B)

Light of different colours travel at different speeds in medium because wavelength of light depends on refractive index and so velocity also depends on refractive index.

$v=f.{\lambda }_0\left(invacuum\right)$

But in medium

The wavelength is $\lambda =\frac{{\lambda }_0}{\mu }\left(inmediumofrefractiveindex\mu \right)$

and velocity becomes

$v=f.\frac{{\lambda }_0}{\mu }$

Thus the given statement is false.