If the intensity of incident light is made double, then the maximum number of emitted electrons will become
Correct answer: A. double
- A. double
- B. eight times
- C. four times
- D. half
Explanation
When the intensity of incident light is doubled, it means the number of photons striking the surface per unit time is doubled. This results in a proportional increase in the number of photoelectrons emitted, assuming the frequency of the light is above the threshold frequency required to emit electrons. Therefore, the maximum number of emitted electrons becomes double. The other options suggest non-linear relationships or incorrect effects, which do not apply to the linear correlation between light intensity and the number of emitted electrons.
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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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