Related questions
Question
![**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](https://content.bartleby.com/qna-images/question/3fe8677b-d2b4-4cf1-b1ed-08820154fcb5/91cf8313-a3fb-4d8e-8be1-ce970b179b0b/9r7flo_processed.png)
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
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by stepSolved in 3 steps
Knowledge Booster
Similar questions
- Question: The electronic structure of atoms and molecules may be investigated using photoelectron spectroscopy. An electron in a photoelectron spectrometer is accelerated from rest by a uniform electric field to a speed of 420 km s−1 in 10 µs. Determine the kinetic energy of the electron?arrow_forwardConsider a material that is well approximated by a black body. The max. emitted irradiance is found at a wavelength of 445 nm. What is the temperature of the black body. Provide your answer in Kelvin.arrow_forwardA square metal plate with a side 0.4m is heated to a temperature of 2000k by passing a current through it. Assuming that it behaves like a blackbody, how much power does the plate radiate under these conditions?arrow_forward
- In kinetic theory of gases, atoms are modeled as point masses m with mean speed v related to temperature T by m v^2 = 3 k T, where k is Boltzmann’s constant. Assuming gas atoms travel several thousand Angstroms between collisions with each other, how cool would hydrogen gas need to be before quantum mechanics would have to be taken into consideration?arrow_forwardThe peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45 μm. If the peak wavelength of emitted radiation changes to 2.90 μm, then the temperature (in K) of the black body isarrow_forwardWhen you shine a certain source of EM radiation on a sheet of gold (work function W1 = 5.1 eV), the stopping voltage required to bring all the ejected electrons to a halt is V = 3.5 V. If you were to use this same source of EM radiation on a sheet of potassium (work function W2 = 2.3 eV), what would be the maximum speed of ejected electrons?arrow_forward
- An electron and an antielectron (each has mass 9.11 x 10-31 kg), each traveling at 0.6c relative to the lab frame, collide head on and annihilate, resulting in the creation of two identical photons which travel away in opposite directions. What is the frequency of each photon?arrow_forwardAn electron is moving at 6.0 x 10^6 m/s. A photon of what wavelength would have the same (relativistic) momentum as the electron?arrow_forwardCan you help with this please?arrow_forward
arrow_back_ios
arrow_forward_ios