EM Spectrum

 

Analog and Digital

 

Inverse Square Law

 

Intensity = 1 / distance^2

When you get farther away, the sound gets less intense (quieter)

Sound Wave

 

Image of a sound wave traveling through particles.

Wave Speed Equation

Watch THIS VIDEO which shows some example problems

 

Labeled Waves

 

Constructive and Deconstructive Waves

 Constructive Interference is when waves ADD or BUILD. The waves are on the SAME SIDE.

Deconstructive Interference is when waves SUBTRACT or CANCEL each other (temporarily until they're no longer overlapping). The waves are on OPPOSITE SIDES.

You can also have interference with standing waves. Look to see how they're "in sync" or "out of sync" and how that makes them add to be bigger or cancel to be smaller.

Examples:

A (+2) + (+3) wave = +5 wave

A (-2) + (+3) wave = +1 wave

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