The momentum of wave where wavelength is 1.32 x 10^-9 m:
Correct answer: A. 5.00 x 10^-25 Ns
- A. 5.00 x 10^-25 Ns
- B. 5.00 x 10^-26 Ns
- C. 5.00 x 10^-43 Ns
- D. 5.00 x 10^-44Ns
Explanation
Using de broglie's wavelength mv=h/𝞴 Where h is planck's constant whose value is 6.6x10-³⁴J.s =6.6x10-³⁴/1.32x10-⁹ =5x10-²⁵ N.s Ans
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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