Question

When a ray of light travels from denser to rarer medium:
(A). It bends towards the normal
(B). It bends away from the normal
(C). It goes perpendicularly
(D). All

Answer 1

Hint: In these questions remember the Snell’s law and also basic concepts of light for example when a light changes its medium its wavelength, velocity.

Complete step-by-step solution -

When light travels from a denser medium to a rarer medium, it bends away from the normal, as illustrated to the left. This behavior follows from Snell's Law. As you saw before, the larger angle must be in the medium having the lower index of refraction.

Hence, option (B) is correct

Note: Here we used a term Snell’s law which can be described as Snell’s law is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, the light of the color given and the pair of media given.
Snell’s law formula is expressed as: $\dfrac{{\sin i}}{{\sin r}} = cons\tan t = \mu $