Hiya.(adsbygoogle = window.adsbygoogle || []).push({});

I'm really stuck on the following questions and so any help would be really appeciated.

(a) A laser produces light of wavelength 632nm. Calculate the energy of the laser photons.

Speed = Wavelength x Frequency

3 x 108 = 632 x 10^-9 x f

f = 4.75 x 10^14 Hz

E = hf

E = 6.6 x 10^-34 x 4.75 x 10^14

E = 3.14 x 10^-19 J

(b) The laser has a power output of 100Mw. Calculate the number of photons released each second.

Thank you.

Cathy

**Physics Forums - The Fusion of Science and Community**

# Quantum Theory questions

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Quantum Theory questions

Loading...

**Physics Forums - The Fusion of Science and Community**