A device based on photoelectric effect is called:
Correct answer: A. Photo cell
- A. Photo cell
- B. Battery
- C. Dry cell
- D. Photo diode
Explanation
A device based on the photoelectric effect is commonly referred to as a "photoelectric cell" or "photocell." Photoelectric cells are devices that utilize the photoemission of electrons from a material when exposed to light.
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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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