Measure the speed of light

You can do it in the comfort of your own home! Do you have one of these?

That’s right, all you need is a microwave and something that melts kinda easily..let’s say one of these:

The next thing you will need to know is the frequency of microwave radiation - there is a good chance it is written somewhere on your microwave. The standard is usually 2.45 GHz (gigahertz).

Remove the turntable first, place your chocky bar in and after microwaving for a bit - take your chocolate out and measure the distance between two melted spots. Multiplying this distance by 2 will give you the wavelength of microwave radiation (since the microwaves have set up a ‘standing wave’) interference inside the microwave oven.

The product of the wavelength and frequency should give you the speed of light!