Question

Describe the difference between red light and blue light.

Answer 1

Red light has longer wavelength, while blue light has higher frequency

Step-by-step explanation:

Red light and blue light corresponds to two different portion of the visible part of the electromagnetic spectrum.

The two colors have different wavelengths - more precisely:

Blue: 450 - 500 nm

Red: 620 - 750 nm

So, we see that red light has a longer wavelength than blue light.

Moreover, the frequency of an electromagnetic wave, f, is inversely proportional to the wavelength,
`\lambda`:

`f=(c)/(\lambda)`

where c is the speed of light. This means that blue light, which has a shorter wavelength, has a higher frequency than red light.