Question

When a ray of light travels from optically denser medium to optically rarer medium, it always bends ____ the normal.

• A. towards
• B. away from
• C. same as
• D. can't say

Answer 1

The correct option is B away from

When a ray of light travels from optically denser medium to optically rarer medium, it always bends away from the normal.
According to Snell's Law: $\frac{n_2}{n_1}=\frac{sini}{sinr}$
For optically denser medium, refractive index $n_1$ is greater than that of the rarer medium $n_2$. Thus, the angle of refraction has to be greater than angle of incidence i.e. it bends away from the normal.