Which of the following causes refraction of light?
(a) Change in the density of light from one medium to another
(b) Change in viscosity of light from one medium to another
(c) Change in the speed of light from one medium to another
(d) Change in direction of light from one medium to another
This question was addressed to me in a job interview.
This interesting question is from Reflection of Light by Spherical Mirrors topic in portion Ray Optics and Optical Instruments of Physics – Class 12