- #1
Gear300
- 1,213
- 9
There is a still-water lake and air interface. Light travels from the water to the air so that the incident angle is also a critical angle, making it so that the light runs along the surface of the water. Considering that this ray is reversible (air to water), a fish looking up at the surface at a critical angle would technically be able to see the shoreline. What kind of confused me is that this would mean that the light would travel along the surface of the water until it got to a certain point (the point the fish is looking at) and refract towards the fish...considering that the light is traveling along the surface, why wouldn't the light refract at any other point?