Definitions

Question 1

define wavelength

Answer 1

distance between a point on one wave and the same point on the next

Question 2

define amplitude

Answer 2

distance from equilibrium position to the maximum displacement

Question 3

define frequency

Answer 3

number of waves that pass a single point per second

Question 4

define wavespeed

Answer 4

distance travelled by a wave each second

Question 5

define ultrasound

Answer 5

is the name given to sound waves with a frequency greater than 20kHz

Question 6

define snells law

Answer 6

when light enters a denser medium it speed slows down and it bends or n = sin i / sin r

Question 7

define total internal reflection

Answer 7

this is when light travels from a more dense medium to a less dense medium and all light is reflected and the angle of incidence is greater than the critical angle

Question 8

define critical angle

Answer 8

this is the greatest angle of incidence at which refraction occurs