p2:waves - adding waves

Question 1

what is coherence(5 things)

Answer 1

when waves have the same
wavelength
frequacny
velocity
a constant phase edifference

Question 2

what do waved need to be to interact with each other

Answer 2

coherent

Question 3

what is the phase difference

Answer 3

constant relationship between two cohernt waves

Question 4

what is superposition

Answer 4

when two waves hit each other their amplitudes are added together

Question 5

what happens when two waves are 180 degrees(out of phase)

Answer 5

cancel each other out

Question 6

what is the equations for constructive interference and destructive interference

Answer 6

n x wavelenghth

(n +1/5)xwavelength

Question 7

what is a standing wave

Answer 7

2 waves of the same frequecny travelling in opposite direction superpose each other

Question 8

how are nodes and antinodes formed

Answer 8

by standing waves

Question 9

what can standing waves only happen on

Answer 9

string
microwaves
and sound waves

Question 10

what type of interference are nodes
what type of interference are antinodes

Answer 10

nodes = destructive
antinodes = constructive

Question 11

whats the phase difference between adjacent nodes

Answer 11

180

Question 12

how do you calculate the frequency of a wave on a string

Answer 12

1/2l x √(t/µ)

Question 13

what does µ mean

Answer 13

mass per unit length

Question 14

what does t =

Answer 14

tension

Question 15

what does 1/2l mean

Answer 15

first harmonic