Trying to help a friend with Chem

[L__]

I can't seem to remember this stuff and a friend asked me for help

._.

Can someone help me with

"What is the energy of a photon of red light having a frequency of 4.48 x 10^14"

I forgot how to calculate wavelength/frequency/velocity

...I think it's

lambda = v/f

someone please correct me if I'm wrong

 

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I haven't had chem in a while and don't really remember.

Saw on yahoo answers:
The wave equation: Speed = frequency * wavelength, v = fλ
It can also be written as: Speed = wavelength / period, v = λ / T

 

[L__]

Gah

hopefully he did well on that test

thanks anyways