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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?