Question

122. Mass of electron = 9.1 x 10-kg. The kinetic
energy of an electron is 4.55 x 10-25. What
is its wavelength (in nm)?
1) 728 2) 850 3) 896 4) 786​

Answer 1

Answer:

Option no.3

896

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Answer 2

Explanation:

Mass of electron = 9.1 x 10-kg. The kinetic

energy of an electron is 4.55 x 10-25

wave length=728

lambda=h/mv

v=10³

h=6.626×10—34