Hospital X-ray generators emit X rays with wavelength of about 15.0 nanometers (nm), where 1 nm=10^-9m . What is the energyo f the X rays?
1 Answer
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E = h c / w, where h = Planck's constant, c = speed of light, and w = wavelength.
E = 6.63 x 10^-34 J s x 3.00 x 10^8 m/s / 15.0 x 10^-9 m = 1.33 x 10^-17 J
