In an experiment, a light source of 620 nm is used to eject electrons from a material. Initially, there is emission. The emission takes place when the material is moved towards the material at a velocity of 0.3c. From this data calculate the work function of the material.
In an experiment, a light source of 620 nm is used to eject electrons from a material. Initially, there is emission. The emission takes place when the material is moved towards the material at a velocity of 0.3c. From this data calculate the work function of the material.
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![**Title: Photoelectric Effect Experiment**
**Transcript of the Experiment Description:**
In an experiment, a light source of 620 nm is used to eject electrons from a material. Initially, there is no emission. The emission takes place when the material is moved towards the light source at a velocity of 0.3c. From this data, calculate the work function of the material.
**Explanation of Procedure:**
In this particular experiment, researchers are aiming to study the photoelectric effect—a phenomenon where electrons are ejected from a material when it is exposed to light of a certain wavelength.
**Key Details:**
1. **Wavelength of Light Source:** The experiment uses a light source with a wavelength of 620 nanometers (nm).
2. **Emission Condition:** Initially, no electrons are ejected from the material. However, once the material is moved towards the light source at a velocity of 0.3c (where c is the speed of light), electrons start to be emitted.
3. **Objective:** Using this information, the goal is to calculate the work function of the material, which is the minimum energy required to eject electrons from its surface.
**Graph/Diagram Explanation:**
While no specific graphs or diagrams are included in the described text, a typical representation for such an experiment might include:
- A wavelength vs. electron energy graph showing at what point emission begins.
- A schematic showing the setup of the experiment, including the light source, material, and movement direction.
**Conceptual Background:**
The photoelectric effect is essential in quantum physics and has applications in various technologies such as photovoltaic cells and sensors. Understanding the work function of materials provides insights into their electronic properties and behavior under illumination.
By moving the material towards the light source, the researchers manipulate the relative velocity to achieve the necessary conditions for electron emission. This data can then be used to apply the principles of Einstein's photoelectric equation to find the work function.
**Calculation of Work Function:**
To compute the work function (ϕ), use the photoelectric equation modified by relativistic Doppler effect principles due to the velocity aspect.
\[ \text{Work Function (ϕ)} = E_{\text{photon}} - K.E. \]
\[ \text{Energy of Photon (E}_{\text{photon}} ) = \frac{hc}{\lambda} \]
Where:
- \( h \) is Planck's constant
- \( c \) is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3fe8677b-d2b4-4cf1-b1ed-08820154fcb5%2F91cf8313-a3fb-4d8e-8be1-ce970b179b0b%2F9r7flo_processed.png&w=3840&q=75)
Transcribed Image Text:**Title: Photoelectric Effect Experiment**
**Transcript of the Experiment Description:**
In an experiment, a light source of 620 nm is used to eject electrons from a material. Initially, there is no emission. The emission takes place when the material is moved towards the light source at a velocity of 0.3c. From this data, calculate the work function of the material.
**Explanation of Procedure:**
In this particular experiment, researchers are aiming to study the photoelectric effect—a phenomenon where electrons are ejected from a material when it is exposed to light of a certain wavelength.
**Key Details:**
1. **Wavelength of Light Source:** The experiment uses a light source with a wavelength of 620 nanometers (nm).
2. **Emission Condition:** Initially, no electrons are ejected from the material. However, once the material is moved towards the light source at a velocity of 0.3c (where c is the speed of light), electrons start to be emitted.
3. **Objective:** Using this information, the goal is to calculate the work function of the material, which is the minimum energy required to eject electrons from its surface.
**Graph/Diagram Explanation:**
While no specific graphs or diagrams are included in the described text, a typical representation for such an experiment might include:
- A wavelength vs. electron energy graph showing at what point emission begins.
- A schematic showing the setup of the experiment, including the light source, material, and movement direction.
**Conceptual Background:**
The photoelectric effect is essential in quantum physics and has applications in various technologies such as photovoltaic cells and sensors. Understanding the work function of materials provides insights into their electronic properties and behavior under illumination.
By moving the material towards the light source, the researchers manipulate the relative velocity to achieve the necessary conditions for electron emission. This data can then be used to apply the principles of Einstein's photoelectric equation to find the work function.
**Calculation of Work Function:**
To compute the work function (ϕ), use the photoelectric equation modified by relativistic Doppler effect principles due to the velocity aspect.
\[ \text{Work Function (ϕ)} = E_{\text{photon}} - K.E. \]
\[ \text{Energy of Photon (E}_{\text{photon}} ) = \frac{hc}{\lambda} \]
Where:
- \( h \) is Planck's constant
- \( c \) is
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