Section 3: Waves

a) Units
b) Properties of waves
c) The electromagnetic spectrum
d) Light and sound

a) Units

3.1 use the following units: degree (o), herts (Hz), meter (m), meter/second (m/s), second (s).

 

S.NoQuantityunitSymbol
1

Frequency

Definition:

Number of vibrations in a second.

OR

number of cycles in a  second

OR

Total number of waves passing through a single point/mark in a second.

Hertz

or

Cycles/second

Hz
2

Wavelength


Definition: distance between two consecutive crest or trough.

wavelength

Meter

m

3

Speed of waves

Meter/second m/s

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