What is the phenomenon called when light changes speed and direction while passing from one medium to another?
A
Reflection
B
Interference
C
Refraction
D
Polarization
Correct Answer: Option C — Refraction
Explanation:
Refraction is the bending of light as it passes from one transparent medium to another with a different optical density, caused by a change in the speed of light. This phenomenon explains why a straw appears bent when placed in water.