The photoelectric effect is not possible with _ photons.
Correct answer: B. Beta rays
- A. X-rays
- B. Beta rays
- C. Gamma rays
- D. All of these options are correct
Explanation
Beta rays consist of high-energy electrons or positrons emitted from the nucleus of a radioactive atom during beta decay. While beta particles can interact with matter and cause ionization, they typically do not directly exhibit the photoelectric effect as it requires photons. Therefore, this option is correct. Beta particles can still ionize atoms by knocking off electrons through collisions, but it's not considered the photoelectric effect.
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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