What is Amplitude?

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Answer 1 · 2014-11-06T23:11:13

#"(Amplitude)"=1/2["(Highest Value)"-"(Lowest Value)"]#

graph{4sinx [-11.25, 11.25, -5.62, 5.625]}

In this sine wave the highest value is #4# and the lowest is #-4#

So the maximum deflection from the middle is #4#k.

This is called the amplitude

If the middle value is different from #0# then the story still holds
graph{2+4sinx [-16.02, 16.01, -8, 8.01]}

You see the highest value is 6 and the lowest is -2,
The amplitude is still #1/2 (6- -2)=1/2 *8=4#