An ultraviolet light bulb, emitting at 400nm and an infared light, emitting at 700nm are both rated at 400 W.(adsbygoogle = window.adsbygoogle || []).push({});

a. Which bulb radiates more photons at the greater rate?

I thought about it long and hard and only thing i can think of

is to use the rleationship: v=lambda*f

where v would be C- the speed of light

solve for the frequency and we know the wavelength for each bulb.

b. How many more photons does it generate per second than the other bulb?

I was thinking of using the following relationship:

E=hc/Lamda

Determine the energy, and we know that Power=Energy/time

solve for the time?

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# Homework Help: Photon question

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