Multiple choice

The reason for a swimming pool to appear less deep than the actual depth is _____.

  1. refraction

  2. light scattering

  3. reflection

  4. interference

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Refraction causes the swimming pool to appear shallower than it actually is. Light rays from the bottom bend (refract) away from the normal as they pass from water to air, making the virtual image appear raised. This is why objects underwater seem closer to the surface.