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Flashcards in Oscillations and waves Deck (20):
1

amplitude

the maximum distance moved from the rest point

2

frequency

number of cycles in 1s (Hz)

3

phase difference

the amount by which two waves are out of step with each other (0-2π)

4

wavelength

the length for one complete cycle (m)

5

wave speed

the distance traveled by a wave in 1s (ms^-1)
(time for 1 wavelength)

6

intensity

the energy per unit area per unit time (Wm^-2)
amplitude^2

7

SHM

the motion when acceleration has a magnitude proportional to displacement from a fixed point with a direction to a fixed point
a=-ω^2(x)

8

progressive waves

waves which travel whilst transferring energy. moving equivalent of a standing wave

9

transverse wave

vibrations at right angles to direction

10

longitudinal wave

vibrations parallel to direction

11

natural frequency

characteristic frequency with which a system oscillates about its equilibrium

12

damped oscillations

oscillations that eventually die due to dissipation of energy by friction, viscosity or other means

13

resonance

a condition when a vibrating system responds with maximum amplitude to an external force

14

critical damped

when the oscillations stop the soonest

15

Hooke's law

F=kx

Energy stored=.5kx^2

16

Electromagnetic spectrum

Gamma 10^-15
X-Ray 10^-12
UV 10^-9
Visible 10^-7
Infra Red 10^-5
Microwaves 10^-2
Radio 10

17

Ray

Direction of the wave

18

Wavefront

Joins points of same phase

19

Principle of superposition

When two waves meet, total displacement at at any point vector sum of individual displacements

20

Path difference

Difference in distance from wave source to observer