# de Broglie wavelength of the electron and ball

Part 1) Through what potential difference would an electron have to be accelerated from rest to give it a de Broglie wavelength of 1.2 Ã— 10^ -10 m?

The mass of an electron is 9.109 Ã— 10^-31 kg and Planck's constant is 6.626 Ã— 10 ^-34 J s

Answer in Volts.

Part 2) A ball has a mass of 0.303 kg just before it strikes the Earth after being dropped from a building 78.7 m tall. The acceleration of gravity is 9.8 m/s^2 .

What is its de Broglie wavelength?

Answer in units of m.

https://brainmass.com/physics/wave-particle-duality/de-broglie-wavelength-electron-ball-148936

#### Solution Preview

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part 1) Through what potential difference would an electron have to be accelerated from

rest to give it a de Broglie wavelength of 1.2 Ã— 10^ âˆ’10 m?

The mass of an electron is 9.109 Ã— 10^ âˆ’31 kg

and Planck's constant is 6.626 Ã— 10 ^âˆ’34 J s

answer in Volts.

Let's develop the relationship ...

#### Solution Summary

De Broglie wavelength is investigated. The solution is detailed and well presented. The potential differences the electron has to be accelerated from rest to a de Broglie wavelength is determined.