Radiation produced from TV picture tube is_____________?
Correct answer: B. X-rays
- A. B-rays
- B. X-rays
- C. Far infrared
- D. Infrared
Explanation
Electrons accelerated through the high voltage in a television picture tube can strike the screen and produce bremsstrahlung X-rays, especially when they are rapidly stopped. The likely mistake is beta rays, because beta rays are high-speed electrons themselves, whereas the radiation produced on stopping them is X-rays.
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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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