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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Dawn of Modern Physics questions
A laser is a device that can produce:
The Davisson and Germen experiment indicate:
Which of the following graphs correcty represents the variation of particle momentum with associated de broglie wavelength?
The maximum energy of the electrons released in a photo cell is independent of
A photoelectric cell is illuminated by a point source of light 1 m away. When the source is taken 2m away
Which one of the following has the highest energy content?