Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Identify the correct statement(s) :
A
Wavelength associated with a 1 kg ball moving with the velocity 100 m/s can’t be calculated.
B
Wave nature of the running train is difficult to observe because wavelength is extremely small.
C
Wavelength associated with the electron can be calculated using the formulae E = 
D
If an electron is accelerated through 20 V potential difference if it has already 5eV kinetic energy then wavelength of the electron is approximately 
Å.
Å.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b,d) λ can be calculated as : λ = 
= 
= 6.626 × 10 –36 m. (very small).
de-Broglie wavelength associated with macroscopic particles is extremely small and so, difficult to observe.
de-Broglie wavelength associated with electron can be calculated by using λ = 
.
KE f = 5 + 20 = 25 eV. ∴ λ = 
= 
= 
Å.
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