The appearance of a stick at the interface when immersed in water is an example of___________.

Correct option is C

The correct answer is (C)  ​refraction of light

• ​When a stick is partially immersed in water, it looks bent or displaced at the water's surface.
• This happens because of refraction, the bending of light as it travels from one medium to another with a different optical density.​
  

Information booster:

• Light rays from the submerged part of the stick travel from water (denser medium) to air (less dense medium).
• As light moves from water to air, it bends away from the normal at the surface.
• This bending of light causes the submerged part of the stick to appear higher than its actual position, forming a virtual image above the stick's true tip.
• The stick seems bent or broken at the water's surface due to this apparent displacement.

This phenomenon also explains why objects viewed through curved glass or water appear distorted.