Question

A laser produces 20.0 mW of red light. In 1 hour, the laser emits 2.29 X 10^20 photons. What is the wavelength of the laser?

Answer 1

Wavelengh is \[6.31\times 10^{-7}\]

Answer 2

Do you need my solution?

Answer 3

yes

Answer 4

of course I do, please

Answer 5

The power of laser is \[2\times 10^{-3} Joule/seconds\] so in 1 hour or 3600 seconds
we get 72 joules.
\[E=nhc/\]
we know h, c and n and E, so we get wavelengh.

Answer 6

sorry but what is n ?

Answer 7

you are welcomed.
n is the number of photons and it has said that it is \[2.29\times 10^{20}\]

Answer 8

Thank you so much

Answer 9

It is an honor to help. Do you study molecular spectroscopy?

Answer 10

I study Quantum-Mechanical Model of Atom