Question

The phenomenon at the surface AC is 1. Refraction 2. Partial reflection3. Total internal reflection 4. Scattering.​

Answer 1

(3) The phenomenon at the surface AC is total internal reflection.

Explanation:

• At the time of light rays entering from optically denser to rarer medium, the total internal reflection occurs in the prism.
• A ray of light has a complete reflection within a medium is called total internal reflection.
• If the angle of incidence is higher than critical angle, the phenomenon of total internal reflection takes place in the prism.
• At the surface AB, the angle of incidence strikes normally and at the surface of AC it is not deviated to strike.
• Hence, at the surface AC, the angle of incidence will be greater than the critical angle.