Wave nature of matter

Calculate the de-Broglie wavelength associated with an electron moving with velocity 107 m/s

• 0.45x10-9 m
• 0.18x10-18 m
• 0.62x10-11 m
• 0.72x10 -10m

Find the ratio of velocities of proton and alpha particle , if de-broglie wavelength of both the particle is same

• 3:1
• 4:1
• 2:1
• 6:1

An electron is accelerated through a potential difference of 100V , calculate the De-Broglie wavelength associated with the electron

• 0.121 nm
• 0.156nm
• 0.123nm
• 0.145 nm

Determine the de-Broglie wavelength associated with a ball of mass 150g travelling at 30m/s

• 1.34x10-23m
• 1.45x10-8 m
• 1.56x10-33m
• 1.47x10 -34m

The Idea of matter waves was given by

• Davisson and Germer
• de-Broglie
• Einstein
• Planck

The wavelength of the matter wave is dependent on

• Mass
• velocity
• Momentum
• all of these

de-Broglie hypothesis treated electron as

• particles
• waves
• Both (a) and (b)
• none of these

A photon an electron and a uranium nucleus all have the same wavelength. The one with the most energy

• Is the proton
• Is the electron
• Is the uranium nucleus
• Depends upon the wavelength and the properties of the particle.

A particle which has zero rest mass and non-zero energy and momentum must travel with a speed

• Equal to c the speed of light in vacuum
• Greater than c
• Less than c
• tending to infinity

The de-Broglie wavelengths λ associated with an electron having kinetic energy E is given by the expression

• h/ √2 m E
• 2h/ mE
• 2mhE
• 2√2mE/h