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Q3. Calculating Wavelength of a Photon (Medium)
A photon is emitted from an atom with an energy of 4.25
x10-19 J. What is the wavelength of the photon?
A） 467 nm b. 2.73 x 10-4 m c. 1.28 x 10-10 m
B） 6.42 x 1014 m