If the intensity of the light were to be decreased (that is, if the light is made dimmer), how would that affect the kinetic energy of the ejected electron? (A) The decreased intensity would increase the kinetic energy. (B) The decreased intensity would decrease the kinetic energy. (C) The decreased intensity would stop all electron emissions completely. (D) The decreased intensity would have no effect.

Short Answer

Expert verified
(D) The decreased intensity would have no effect.

Step by step solution

01

Understand the Photoelectric Effect

For the concept of Photoelectric effect, it's key to remember that the kinetic energy of the ejected electrons does not depend on the intensity of the light (which refers to the number of photons) but on the frequency of light (which determines the energy of each individual photon).
02

Apply the Concept

Decreasing the intensity of light will decrease the number of photons emitted, not the energy of each photon. Therefore, it wouldn't affect the kinetic energy of the ejected electrons. The energy of electrons is determined by the frequency of the light, according to the equation for energy of a photon \(E = hf\), where \(h\) is the Planck's constant and \(f\) is the frequency of the light.
03

Determine the Answer

Since decreasing the intensity does not change the kinetic energy of the ejected electrons, but rather the number of electrons being ejected, the correct answer is (D) The decreased intensity would have no effect.

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