Question

If i and r are the angles of incidence and refraction respectively, then i <r means the light ray travels from

• A. denser to rarer medium
• B. rarer to denser medium
• C. throughout denser medium only
• D. throughout rarer medium only

Answer 1

The Correct Option is A

The angle of incidence \( i \) and the angle of refraction \( r \) are related by Snell's Law, which describes the behavior of light when it passes from one medium to another. Snell's Law states: \[ \frac{\sin i}{\sin r} = \frac{v_1}{v_2} = \frac{n_2}{n_1} \] Where \( n_1 \) and \( n_2 \) are the refractive indices of the two media and \( v_1 \) and \( v_2 \) are the velocities of light in those media. If \( i < r \), this means that the light ray is traveling from a denser medium to a rarer medium, causing the light to bend away from the normal. Thus, the light ray travels from the denser medium to the rarer medium.

The correct option is (A): denser to rarer medium