Well the speed of light is equal to the frequency times the wavelength. So this means that if the wave has a frequency of 100 Hz it will travel its wavelength 100 times in a second. What this equation tells us is that the speed of light is equal to the wavelength l multiplied by the frequency f of an electromagnetic wave microwaves and visible light are both examples of electromagnetic waves.
Wave frequency is how many times a wave bounces up and down in one second.
And a microwave oven comes with an indication in the back that shows the frequency. Look for a sticker on your microwave that tells you its frequency in Hertz Hz. And your regular old microwave probably came with its frequency written on it. To show you how to do this quantum kitchen experiment heres Ross.