The wavelength associated with an electron is of the order:
Correct answer: B. X rays
- A. Visible light
- B. X rays
- C. Radio waves
- D. Infrared waves
Explanation
X-rays are commonly produced by accelerating (or decelerating) charged particles; examples include a beam of electrons in a synchrotron particle accelerator or storage ring. In addition, highly excited atoms can emit X-rays with discrete wavelengths characteristic of the energy level spacings in the atoms. The X-ray region of the electromagnetic spectrum falls far outside the range of visible wavelengths.
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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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