# Calculating the total energy of photons from a helium-neon laser.

A helium-neon laser gives off red light with a wavelength of 632.8 nm (nanometers). What is the energy of the photons coming out of the laser?

(Hint: the speed of light is 3x10 [to the 8th pwr.] m/sec.)

SIDE NOTES:

We have been using very basic equations in this class, it is not advanced or anything. I do not know which equation(s) to use first of all or how to work it out. I need to show ALL work including formulas and steps, possibly drawings to. Thanks in advance!

https://brainmass.com/physics/quantum-properties/calculating-the-total-energy-of-photons-from-a-helium-neon-laser-2697

#### Solution Preview

Max Planck discovered the relationship between the energy of a photon and its wave-like properties (i.e., its wavelength or frequency).

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<br>He came up with an equation ...

$2.19