Wave characteristics Flashcards
1
Q
Wavefront
A
A line joining all the crests and normal to the direction of energy transfer of the wave
2
Q
Rays
A
Lines in the direction of energy transfer of the wave, and hence normal to wavefronts
3
Q
Intensity definition
A
the rate energy is being transmitted per unit area in Wm-2
4
Q
Intensity formula
A
I = power/area
5
Q
Area of a sphere
A
A = 4πr2
6
Q
Total energy for a particle in simple harmonic motion
A
ET = 1/2 kx2
Where x = xMAX = Amplitude
7
Q
Relationship between power and amplitude
A
P ∝ A2
8
Q
Principle of superposition
A
When two waves of the same type meet at a point in space at the same time, the displacement of the medium at that point is the algebraic sum of the individual displacements
