Lecture 1 Flashcards
1
Q
Waves could be
A
transverse or longitudinal
2
Q
waves can be described mathematically as
A
y(x,t) = Acos {kx ± ωt}
3
Q
y(x,t) represents
A
the transverse motion of matter disturbed by the passage of the wave
4
Q
wave number
A
k = 2*pi / lambda
5
Q
angular frequency
A
ω = 2pif = 2*pi / T
6
Q
wave phase
A
{kx ± ωt}
7
Q
the wave equation
A
check notes
8
Q
the energy when looking at simple harmonic motion
A
E = 1/2 m v^2 + 1/2 kx^2 = constant
9
Q
max transverse speed
A
v = √k/m * A
10
Q
Huygen’s principle
A
Every point of an advancing wavefront is a new centre of disturbance from which emanate independent waves in all directions
11
Q
phase velocity
A
v = ω/k
12
Q
group velocity
A
v = Δω/Δk
