Question

The number of photoelectrons emitted depends upon:

• A. The intensity of the incident radiation
• B. The frequency of the incident radiation
• C. The product of intensity and frequency of the incident radiation
• D. None of these

Answer 1

The correct option is A The intensity of the incident radiation

According to Planck's quantum theory, the intensity of the incident beam is directly related to the number of photons in the beam. If the intensity of the beam increases, the number of photons will also increase. As the number of photons incident on the metal surface increases the number of photo-electrons emitted from the metal will also increase.