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Flashcards in Waves Deck (62)
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1

What is wavelength (λ)?

The distance from one peak to the next. Measured in metres.

2

What is frequency (f)?

How many complete waves there are per second. Measured in Hz.

3

What is amplitude?

The height of the wave (from rest to crest)

4

What is period (T)?

How many seconds per complete wave. (The time it takes for one complete wave to pass a point)

5

What is the equation linking frequency and period?

f = 1/T

6

What is the equation linking wavespeed, frequency and wavelength?

wavespeed = frequency x wavelength
(m/s) (Hz) (m)

7

What is a transverse wave?

A wave where the vibrations are at 90° to the direction of energy transferred

8

What is a longitudinal wave?

A wave where the vibrations are parallel to the direction of energy transferred

9

What are two examples of a transverse wave?

- Light and all other EM waves
- Ripples on water

10

What are two examples of a longitudinal wave?

- Sound and ultrasound waves
- Shock waves

11

All waves transfer ..... and ..... without transferring .....

All waves transfer ENERGY and INFORMATION without transferring MATTER

12

What are the 7 types of EM wave?

Radio waves
Micro waves
Infrared waves
Visible waves
Ultraviolet waves
X-rays
Gamma rays

13

Which wave has the highest frequency?

Gamma rays

14

Which wave has the lowest frequency?

Radio waves

15

Which wave has the highest wavelength?

Radio waves

16

Which wave has the lowest wavelength?

Gamma rays

17

What are the four key properties which all EM waves have?

- they are all transverse waves
- they travel at the speed of light through a vacuum
- they all transfer energy
- they can all be reflected, refracted and diffracted

18

What are the detectors of radio waves?

- radio and TV aerials

19

What are the detectors of microwaves?

- microwave recievers

20

What are the detectors of infrared waves?

- skin
- blackened thermometer
- special photographic film

21

What are the detectors of visible light?

- the eye
- photographic film
- light dependant resistors

22

What are the detectors of ultraviolet?

- skin
- photographic film
- some fluorescent chemicals

23

What are the detectors of x-rays?

- photographic film

24

What are the detectors of gamma rays?

- Geiger-Müller tube

25

What are the uses of radio waves?

- long, medium, and short wave radio
- TV

26

What are the uses of microwaves?

- mobile phone and satellite communication
- cooking

27

What are the uses of infrared waves?

- infrared cookers and heaters
- TV and stereo remote controls
- night vision

28

What are the uses of visible light?

- seeing (duh)
- communication in optical fibres
- photography

29

What are the uses of ultraviolet?

- fluorescent tubes
- UV tanning lamps

30

What are the uses of x-rays?

- X-radiography to observe the internal structure of objects including human bodies