Question

A beam of white light traveling in medium $A$ strikes the interface to another transparent medium, medium $B$. If the speed of white light is less in medium $B$ than in medium $A$, the beam will

• A. refract toward the normal
• B. refract away from the normal
• C. undergo total internal reflection
• D. have an angle of reflection smaller than the angle of incidence
• E. have an angle of reflection greater than the angle of incidence

Answer 1

The correct option is A refract toward the normal

As speed of light is lesser in medium $B$ therefore its refractive index will be greater than medium $A$ it means medium $B$ is denser than medium $A$ , we know when light refracts in a denser medium from a rarer medium , it bends towards the normal.So the beam will refract toward the normal.