Calculating the Frequency of Wavelengths




Wavelength The distance between successive crest or trough
in a wave 

Frequency The number of complete waves passing a point in a
given amount of time 
s^{1} or 1 per second or 1/s and is now called a hertz 


Amplitude The maximum height of a wave, as measured from the
axis of propagation 
Nodes Points of zero amplitude 
Calculating Wave Length 

Wavelength (m) X Frequency (s^{1}) = velocity (m/s) 

C = 2.99792458 X 10^{8} m/s^{ 1} 

Example Question 

The frequency of the radiation used in all microwave ovens sold in
the US is 2.45 GHz. (10^{9 }s^{1}) What is the wavelength
(in meters) of this radiation? 

Answer 

2.998 x 10^{8} ms^{1} / 2.45 X 10^{9} s^{1}
= .122 m 
Note The s1 cancel each other out 