reflection and refraction. Flashcards
1
Q
define reflection.
A
when an object reflects as they hit an object such as a barrier.
2
Q
what happens when a wave reflects from a barrier?
A
the angle of incidence = the angle of reflection. (i=r)
3
Q
define refraction.
A
when a waves speed changes after entering a different medium.
4
Q
what are the two other effects refraction has?
A
1) the wavelength of the wave can increase or decrease.
2) the waves can change direction.
5
Q
what happens when water waves travel from deep areas to shallow areas?
A
they slow down causing the wavelength to decrease
