# On the EM Spectrum, which type of wave has the most energy?

##### 1 Answer

Gamma rays.

#### Explanation:

A general guideline tends to be : **short wavelength, high energy** . But here is a way to show which waves are the most energetic:

The energy of a wave is given by the equation:

Hence we can see that the energy of a wave is proportional to its frequency, as the other term is a constant.

Then we can ask ourselves, which waves are the ones with the highest frequency?

If we use another equation:

Then we can see that, as

Now if we use this diagram of the EM-spectrum which show wavelengths:

We can thus conclude that the waves that have the shortest wavelength are gamma rays, and thus they are the most energetic because they must also have the highest frequency.