Question

What is the energy of visible light?

Answer 1

The energy carried by red photons is `1.8 \ "eV"` and that of blue photons is `3.1 \ "eV"`.

Explanation:

Visible light occupies a tiny part of electromagnetic spectrum.

As you can see we have red and blue colors on extreme ends.

Energy of a photon is given by

`E=hnu" (where "E" is energy, "h" is Planck's constant,"and nu" is frequency)"`

`color(red)(h=6.162607004 xx 10^-34 \ "m"^2 \ "kg s"^-1)`

Using this relation we get, energy carried by a red photon is `~~` `1.8 \ "eV"` and of a blue photon is `~~ 3.1 \ "eV"`.

Hope it helps you!