P12 - Waves Flashcards Preview

AQA GCSE Physics > P12 - Waves > Flashcards

Flashcards in P12 - Waves Deck (11)
Loading flashcards...
1

How are transverse and longitudinal waves different?

Transverse waves oscillate perpendicular to the direction of energy. Longitudinal waves oscillate parallel to the direction of energy transfer.

2

What kind of waves are electromagnetic waves?

Transverse

3

What kind of waves are sound waves?

Longitudinal

4

What do mechanical waves need?

A medium to travel through. They can be transverse or longitudinal.

5

Amplitude?

Maximum displacement of a point on the wave from its undisturbed position. (Basically from the straight line through the middle of the wave to the maximum point up or down.)

6

Frequency?

Number of waves a second.

7

Wave speed?

V=fλ

8

Where does refraction occur?

At a boundary between 2 different materials or densities, waves can be transmitted or absorbed.

9

Sound waves cannot...

Travel through a vacuum

10

Equation to work out speed of waves (echos)

S=2d (distance to wall and back)/t ( time delay)

11

To investigate waves, use...

-A ripple tank for water waves
- a spring for waves in a solid - (find one wave, note the frequency, work out speed.)
- a signal generator and a loudspeaker for sound waves.