Multiple choice general knowledge science & technology

phtoelectric effect is used for _.

  1. lighting purpose

  2. cooling purpose

  3. amplification purpose

  4. none of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The photoelectric effect is used for amplification in devices like photomultiplier tubes, where a single photon can trigger a cascade of electrons, greatly amplifying the signal. It is not used for lighting (it converts light to electricity), cooling, or general-purpose applications.

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