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.

Answer 1

I guess I will answer my own question so, if others come across it, it will help

PT/h(lamda)
P: power
T: time (which is the variable in this case)
h: (constant 6.626x10^-34)
c: lamda is found by c/f in which,
c= 3x10^8
frequency= .12 in this case
if you solve accordingly,
t= 19.8 seconds

Answer 2

The frequency of a radiation from your microwave is 120 GHZ. What is the wavelength and energy of the microwave?