posted by Jake .
Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK
How much heat energy is needed to raise the T of the eye?
q(in joules) = mass x specific heat x delta T.
How much energy does each photon have?
E(in joules) = hc/wavelength
E/photon x # photons = q
Solve for # photons.