# College Physics II

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A typical gamma ray emitted from a nucleus during radioactive decay may have an energy of 736 keV. What is its wavelength?

A microwave oven produces electromagnetic radiation at λ = 12.1 cm and produces a power of 778 W. Calculate the number of microwave photons produced by the microwave oven each second

• College Physics II -

Gamma rays travel at the speed of light, 3*10^8 m/s. You can get the frequency f from the Planck relation
E = h*f
h is Planck's constant.
Get to know it.

Convert 736,000 eV to Joules.
1 eV = 1.6*10^-19 J
E = 736 keV = 1.18*10^-13 J
f = E/h = ___
wavelength = c/f = _____

• College Physics II -

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