posted by Rosh .
A particular microwave oven operates at 1000W. The wavelength of the microwave is 12.0cm. You decide that you like your snack to absorb 1.2 x 10^28 photons. For how much time should you have the oven on- with your snack inside of course. Assume 100% efficiency.
I guess I will answer my own question so, if others come across it, it will help
T: time (which is the variable in this case)
h: (constant 6.626x10^-34)
c: lamda is found by c/f in which,
frequency= .12 in this case
if you solve accordingly,
t= 19.8 seconds