There is a question that says :
...etc...the metal is then moved towards the hardboard. In moving 6.4cm, four further maxima are observed. Calculate the wavelength of the ...etc...
Now I know how to solve it, and got the answer.
But why do we count the amplitudes both below in the and above the axis as maxima ?
I thought the maximum points are all the points above the x axis, and the minimum points are the minimum points ??!
The Attempt at a Solution
All I did was : 4 max = 2[tex]\lambda[/tex] .. But these 4 maximum points are both ABOVE and BELOW the x-axis for a sine curve.
If you need me to explain my question exactly, please ask me to clarify.