Fill in the following sentence with the appropriate word or phrase: According to electromagnetic theory, a _____ ray has the same wavelength as the diameter of an atom’s electron cloud If one...

Fill in the following sentence with the appropriate word or phrase: According to electromagnetic theory, a _____ ray has the same wavelength as the diameter of an atom’s electron cloud

If one calculates the velocity of a 10 MeV neutron using classical mechanics, how much error does this introduce into the calculation?