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Which Has a Shorter Wavelength: an Electron with a Kinetic

Question 19

Multiple Choice

Which has a shorter wavelength: an electron with a kinetic energy of 4×10^-¹⁹ J or a photon with an energy of 4×10^-¹⁹ J?

A) the electron
B) the photon
C) they will have the same wavelength
D) there is no way to know

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