4 waves

Question 1

longitudinal

Answer 1

parallel to the direction of travel
can’t be polarised

Sound waves

Question 2

waves

Answer 2

mechanical
-passes through solid materials by vibrating the particle in the substance

electromagnetic

• waves can pass through a vacuum
• electric field and magnetic field are at 90 degrees to each other

Question 3

transverse wave

Answer 3

perpendicular to direction of travel

Can be polarised so is a best for transverse waves

Electromagnetic waves and waves on a spring

Question 4

polarisation

Answer 4

transverse waves are polarised if they all travel in the same plane
(lights isn’t bright)

Question 5

displacement

Answer 5

vibrating particles distance from its equilibrium point

Question 6

amplitude

Answer 6

maximum displacement

Question 7

wavelength

Answer 7

distance from two nodes

Question 8

cycle

Answer 8

max displacement to the next max displacement

Question 9

period

Answer 9

time from one complete wave

Question 10

frequency

Answer 10

F

Question 11

phase difference

Answer 11

1 cycle = 360

a different place in the wave cycle

Question 12

reflection

Answer 12

i=r

Question 13

refraction

Answer 13

bends towards the normal when a light ray enters a denser substance

Question 14

diffraction

Answer 14

narrower gap the waves spread out more

(dish desgin
-bigger dish = stronger signs)

Question 15

(stationary and progressive wave)

frequency

Answer 15

s- all particles except at the same frequency

p- all particles vibrate at the same frequency

Question 16

(stationary and progressive wave)

Amplitude

Answer 16

s- zero to the maximum

p- same aplitude

Question 17

(stationary and progressive wave)

Phase difference

Answer 17

s- mπ

p- 2πd
————
λ

Question 18

harmonic tones

Answer 18

example = stationary wave

-sound in a pipe
resonates at certain frequencies
antinode= bottom end
node = other end

-microwaves

Question 19

fundamental wave

Answer 19

λ= 2L (2 nodes)
λ= L (3 nodes)
λ=2/3L (4 nodes)

Question 20

fundamental wave frequency

Answer 20

only happens at wavelengths of a whole number

F1 = C/2L

F2=C/L

F3=3C/2L

F4=2C/L

Question 21

Oscilloscope

Answer 21

specially made electron tube and control curcuits

displacement of the spot is proportional to the applied pd

Question 22

Oscilloscope

peak pd?

Answer 22

amplitude * y-gain

Question 23

Oscilloscope

Time

Answer 23

time base * one wave distance

Question 24

Speed

Answer 24

Distance divided by time

Question 25

Phase

Answer 25

Defined as the distance between first zero-crossing and the point in space defined as the orgin

Question 26

Phase difference

Answer 26

Difference between two waves having the same frequency and reference to the same point in time

Question 27

True of false

All electromagnetic waves travel at the same speed in a vacuum

Answer 27

True

Question 28

Stationary wave

Standing wave

Answer 28

Combination of two waves moving in opposite directions, each having the same amplitude and frequency, which results in interference and then the waves are superimposed or destructive

Question 29

Node

Answer 29

Part of the wave that stays still

Question 30

Path difference

Answer 30

Difference in meters between the length of two paths

Question 31

Coherence

Answer 31

A fixed relationship between the phase of waves in beam of radiation of a single frequency. Two beams of light are coherent when the phase difference their waves is constant

Question 32

Interference

Answer 32

The process in which two or more light, sound, or electromagnetic waves of the same frequency combine or reinforce or cancel each other, the amplitude of the resulting wave being equal to the sum of the amplitude of the combing waves

Question 33

Monochromatic light

Answer 33

Light of a single wavelength