Question 2.21: The mass of an electron is 9.1 × 10-31 kg. If its K.E. is 3.0 × 10-25 J, calculate its wavelength.
Answer
From de Broglie’s equation,
Given,
Kinetic energy (K.E) of the electron = 3.0 × 10-25 J
Substituting the value in the expression of λ:
Hence, the wavelength of the electron is 8.9625 × 10-7 m.
Answer
From de Broglie’s equation,
Given,
Kinetic energy (K.E) of the electron = 3.0 × 10-25 J
Substituting the value in the expression of λ:
Hence, the wavelength of the electron is 8.9625 × 10-7 m.
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