Physicists love waves.
In fact the study of waves explains lots of everyday phenomena.
Waves carry energy, just think about the waves crashing onto a beach. Waves are all around us: Sound waves, special waves called electromagnetic waves, used for our telecommunications and bluetooth devices, and even earthquake waves.
So let's start our study of the physics of waves.
The Eye and lenses.
Without refraction taking place in lenses we could not have vision.
There would be no cameras, movies, telescopes and microscopes.
All depend on refraction.