Thank you for reporting, we will resolve it shortly
Q.
When light passes through a dispersive medium, it breaks up into various colours. Which of the following statements is correct?
J & K CETJ & K CET 2000
Solution:
When white light passes through a dispersive medium say prism, it splits into its constituent colours. This is known as dispersion. The reason for dispersion is that in a material medium the light rays of different colours travel with different speeds. Hence, refractive index n is different for different colours.
$n=\frac{\text { speed of light in vacuum }}{\text { speed of light in medium }}$
In glass speed of violet light is minimum while that of red light is maximum.