# waves Flashcards Preview

## Year 12 Physics > waves > Flashcards

Flashcards in waves Deck (16)
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1
Q

what do you need to create a sound

A

You need a vibrating force

2
Q

What is a wave

A

a wave is a vibration (of something) that transfers energy from one place to another with no transfer

3
Q

what is amplitude

A

Amplitude is the maximum value of the displacement

4
Q

What is a point of no displacement

A

a node

The opposite of this (a point of max displacement) is called an antinode

5
Q

The principle of superposition

A

when two or more waves cross at a point, the displacement at that point is equal to the sum of the displacements of the individual waves

6
Q

How is a stationary wave produced

A

a stationary wave is the result of interference between two travelling waves of equal frequency and amplitude, travelling along the same line with the same speed but in opposite directions

7
Q

Resonance

A

In physics, resonance occurs when a forcing frequency equal to (or multiples of) the natural frequency of a system causes the system to vibrate with maximum amplitude. These are known as the system’s resonant frequencies. A resonator may have a fundamental frequency and any number of harmonics.

8
Q

What is a node

A

a point of no displacement

9
Q

What is an antinode

A

the opposite of a node (a point of high displacement)

10
Q

What is the inter nodal distance

A

The distance between two nodes

11
Q

wavelength of red light

A

700nm (nanometers)

12
Q

wavelength of violet light

A

400nm (nanometers)

13
Q

what are coherent sources

A

Constant phase difference

14
Q

Coherent meaning

A

constant phase difference

15
Q

What is monochromatic light

A

one single frequency wavelength

16
Q

Equations for finding light (and other waves)

A

x = λD/a

λ = xa/D