X-ray are________________?
Correct answer: C. high energy photons
- A. of unknown nature
- B. high energy electrons
- C. high energy photons
- D. radio isotopes
Explanation
X-rays are electromagnetic radiation, so they consist of photons, not material electrons or radioactive isotopes. Their high frequency gives each photon high energy according to E = hf. The likely mistake is choosing high-energy electrons because electrons produce X-rays inside an X-ray tube, but the emitted X-rays themselves are photons.
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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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