Question

in the photoelectric effect experiment certain soft metal are exposed to light of particular frequency write any two observation of the photoelectric effect experiment

Answer 1

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Answer 2

Answer:

The minimum condition required for the emission of electrons from the outermost shell of an atom is that the frequency of incident rays should be very high. This will provide energy to the electron to leave its outermost shell.

Explanation:

• For a given metal (photosensitive material), the photoelectric current is directly proportional to the intensity of the light used, above a minimum value of frequency called the threshold frequency.
• The saturation current depends on the intensity for a known value of frequency. At the same time, we see that the stopping potential does not depend on the intensity over a specific value of frequency.
• The Photoelectric effect does not occur below a certain frequency. This is the threshold frequency. If the frequency of light is above the threshold frequency, the stopping potential is directly proportional to the frequency. In other words, to stop an electron emitted by a higher frequency, we require more energy. The stopping potential provides this energy.
• All of this happens instantaneously. As soon as we open the quartz window, electron emission starts.