Question

When light passes from one medium to another, this phenomenon of change in its direction is called _____.
A) Refraction B) Diffraction C) Propagation D) No option is correct

Answer 1

ANSWER

Reflection is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.  

Refraction of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

Diffraction is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam.  

Scattering is the phenomenon by which a beam of light is redirected or deflected in many different directions when it passes through an imperfect medium due to the interaction with the particles of the medium.

Hence, the correct answer is OPTION B.