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Flashcards in P4 waves Deck (19):
1

Longitudinal waves

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2

2 types of waves

longitudinal

transverse

3

transverse waves

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4

Method 1 for measuring wave speed

Time how long it takes a wave to travel a measured distance then use the equation s=d/t. Could use ecos to measure the speed if you know the distance tot eh object ref;eating the sound and double it for there and back

5

Method 2 for measuring wave speed

Wave speed = frequency * wavelength

measure the didtance between 2 peaks or troughs and record how many peaks or troughs pass a point in 

6

Speed of sound in air

7

Speed of light

8

Refraction

9

Absorbtion

10

Transmission

11

Rainbows

12

Ultra sound

13

14

Infra sound

15

How the ear work

16

How does the choclea  work

Vibrations from the oval window send waves through the fluid which fills the cochlea and in turn vibrates cilia, high frequencies are picked up by the long hairs at the bottom of the cochlea and low frequencies the short hairs at the top of the cochlea, also the membrane which holds the hairs are thicker and more rigid at the bottom helping pick up higher frequencies.

17

Uses of ultra sound

18

Sonar distance equation

19

Infra sound examples