The kinetic energy of the photo electrons does not depends upon

Options

A. Intensity of incident radiation
B. Frequency of incident radiation
C. Wavelengthof incident radiation
D. Wave number of incident radiation

Answer

To solve the question regarding the kinetic energy of photoelectrons and what it does not depend upon, we can follow these steps:

### Step 1: Understand the Photoelectric Effect
The photoelectric effect describes the phenomenon where electrons are emitted from a material (usually a metal) when it is exposed to light of sufficient frequency. The energy of the incident photons (light particles) is crucial in this process.

### Step 2: Identify the Equation for Kinetic Energy
The kinetic energy (KE) of the emitted photoelectrons can be expressed using the equation:
\[ KE = h\nu - \phi \]
where:
- \( KE \) is the kinetic energy of the emitted photoelectron,
- \( h \) is Planck's constant,
- \( \nu \) (nu) is the frequency of the incident light,
- \( \phi \) (phi) is the work function of the material (the minimum energy required to remove an electron from the surface).

### Step 3: Analyze the Factors Affecting Kinetic Energy
From the equation, we can see that the kinetic energy of the photoelectrons depends on:
- The frequency (\( \nu \)) of the incident light: Higher frequency means higher energy photons, which increases kinetic energy.
- The work function (\( \phi \)): A material with a higher work function will have lower kinetic energy for the same frequency of light.

### Step 4: Identify What Kinetic Energy Does Not Depend Upon
The kinetic energy does not depend on the intensity of the incident light. Intensity refers to the amount of energy per unit area per unit time and is related to the number of photons hitting the surface, not their energy.

### Conclusion
Thus, the kinetic energy of the photoelectrons does not depend upon the intensity of the incident light.

### Final Answer
The kinetic energy of the photoelectrons does not depend upon the intensity of the incident light.

---