Which of the following has the high energy photon?
Correct answer: D. γ-rays
- A. Visible light
- B. X-rays
- C. Ultraviolet light
- D. γ-rays
Explanation
Gamma rays have the highest energy because they are at the extreme end of the electromagnetic spectrum, characterized by very short wavelengths and high frequencies. Visible light, ultraviolet light, and X-rays all have lower energy levels compared to gamma rays. Visible light has the least energy among the options, followed by ultraviolet light, then X-rays, with gamma rays having the most energy.
This question appeared on the ETEA MDCAT 2006 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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