Physics for IGCSE & O level - Waves And Sounds (Section 1 - No. 12)
Which of the following scenarios demonstrates refraction?
An echo bouncing off a wall.
A straw appearing bent in a glass of water.
The spreading out of sound through a doorway.
A laser beam passing through a prism.
Vysvetlenie
Refraction is the bending of waves as they pass from one medium to another.