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Questions and Answers
According to the text, what did Christian Huygens propose in 1678?
According to the text, what did Christian Huygens propose in 1678?
- Light was a form of energy
- Light was a wave (correct)
- Light was a particle
- Light was a form of matter
What is the result of constructive interference?
What is the result of constructive interference?
- Greater amplitude (correct)
- Reduced amplitude
- No change in amplitude
- Formation of a new wave
In the double-slit experiment, what is the condition for destructive interference?
In the double-slit experiment, what is the condition for destructive interference?
- $ΔL = (m + 1/2) \lambda$ (correct)
- $ΔL = d \sin θ = m\lambda$, where $m = 0, ±1, ±2$
- $ΔL = d \sin θ$
- $ΔL = (m + 1/2) \lambda$, where $m = 0, ±1, ±2$
What is the basic idea of quantum theory?
What is the basic idea of quantum theory?
What does the Heisenberg’s Uncertainty Principle examine?
What does the Heisenberg’s Uncertainty Principle examine?
What happens when one of the slits in the double-slit experiment is closed?
What happens when one of the slits in the double-slit experiment is closed?
How do Alice and Bob ensure private communication in quantum communications?
How do Alice and Bob ensure private communication in quantum communications?
What did Newton assume about light in the late 1600s?
What did Newton assume about light in the late 1600s?
Which theory dissolved the classical distinction between point particles and non-local fields/waves?
Which theory dissolved the classical distinction between point particles and non-local fields/waves?
What is a characteristic of all waves?
What is a characteristic of all waves?
What phenomenon is a characteristic of all waves?
What phenomenon is a characteristic of all waves?
What did Einstein's Quantum theory do?
What did Einstein's Quantum theory do?
In the double-slit experiment, what is the result of constructive interference?
In the double-slit experiment, what is the result of constructive interference?
In the context of wave theory of light, what determines the wave velocity and interference?
In the context of wave theory of light, what determines the wave velocity and interference?
What condition must sources satisfy in the double-slit experiment to produce interference patterns?
What condition must sources satisfy in the double-slit experiment to produce interference patterns?
If the second-order bright fringe in a double-slit experiment is 4.5 cm from the center line, what is the distance between adjacent bright fringes if the wavelength is 560 nm?
If the second-order bright fringe in a double-slit experiment is 4.5 cm from the center line, what is the distance between adjacent bright fringes if the wavelength is 560 nm?
In the double-slit experiment with different conditions, which of the following scenarios would destroy the interference pattern?
In the double-slit experiment with different conditions, which of the following scenarios would destroy the interference pattern?
What is the formula for calculating the bright fringe width in the double-slit experiment?
What is the formula for calculating the bright fringe width in the double-slit experiment?
According to Heisenberg’s Uncertainty Principle, what happens to a particle's position and momentum?
According to Heisenberg’s Uncertainty Principle, what happens to a particle's position and momentum?
What did G.I. Taylor observe in his 1909 experiment with a very dim light source in the double-slit experiment?
What did G.I. Taylor observe in his 1909 experiment with a very dim light source in the double-slit experiment?
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Study Notes
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Double-slit experiment: A viewing screen is separated from the double-slit source by a certain distance. The distance between the two slits is another distance. The second-order bright fringe (m = 2) is a certain distance from the center line.
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Bright fringe width: The bright fringe width is defined as the distance between two adjacent destructive minima. The formula for calculating the bright fringe width is y = m d L1 / (m + 1) - m = d.
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Taylor experiment: In 1909, G.I. Taylor performed an experiment with a very dim light source and observed the production of an interference pattern even with only one photon passing through the double slit at a time.
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Quantum theory: The basic idea of quantum theory is the impossibility of imagining an isolated quantity of energy without associating with it a certain frequency.
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Heisenberg’s Uncertainty Principle: It helps examine the dual nature of light, electrons, and other particles. A particle’s position and momentum are uncertain, and the more precisely one of them is known, the less precisely the other can be known.
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Quantum communications: Alice and Bob can use quantum keys to ensure their communication remains private. However, Eve's measurements of a quantum signal can cause perturbations that can be detected.
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Double-slit experiment with different conditions: Closing one of the slits results in no interference pattern. Monitoring which slit a single photon entered also eliminates the interference pattern. Using electrons instead of photons also destroys the interference pattern due to the larger photon momentum.
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Double-slit experiment problem set: Q1 asks for the angle of the first-order maximum for 450-nm wavelength blue light, Q2 asks for the angle of the third-order maximum for 580-nm wavelength yellow light, Q3 asks for the separation between two slits for the first maximum of 610-nm orange light at an angle of 30.0°, Q4 asks for the distance between two slits for the first minimum of 410-nm violet light at an angle of 45.0°, Q5 asks for the wavelength of light that has its third minimum at an angle of 30.0° when falling on double slits separated by 3.00 μm, and Q6 asks for the wavelength of light falling on double slits separated by 2.00 μm if the third-order maximum is at an angle of 60.0°, Q7 asks for the angle of the fourth-order maximum in the given situation.
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Double-slit experiment: A viewing screen is separated from the double-slit source by a certain distance. The distance between the two slits is another distance. The second-order bright fringe (m = 2) is a certain distance from the center line.
-
Bright fringe width: The bright fringe width is defined as the distance between two adjacent destructive minima. The formula for calculating the bright fringe width is y = m d L1 / (m + 1) - m = d.
-
Taylor experiment: In 1909, G.I. Taylor performed an experiment with a very dim light source and observed the production of an interference pattern even with only one photon passing through the double slit at a time.
-
Quantum theory: The basic idea of quantum theory is the impossibility of imagining an isolated quantity of energy without associating with it a certain frequency.
-
Heisenberg’s Uncertainty Principle: It helps examine the dual nature of light, electrons, and other particles. A particle’s position and momentum are uncertain, and the more precisely one of them is known, the less precisely the other can be known.
-
Quantum communications: Alice and Bob can use quantum keys to ensure their communication remains private. However, Eve's measurements of a quantum signal can cause perturbations that can be detected.
-
Double-slit experiment with different conditions: Closing one of the slits results in no interference pattern. Monitoring which slit a single photon entered also eliminates the interference pattern. Using electrons instead of photons also destroys the interference pattern due to the larger photon momentum.
-
Double-slit experiment problem set: Q1 asks for the angle of the first-order maximum for 450-nm wavelength blue light, Q2 asks for the angle of the third-order maximum for 580-nm wavelength yellow light, Q3 asks for the separation between two slits for the first maximum of 610-nm orange light at an angle of 30.0°, Q4 asks for the distance between two slits for the first minimum of 410-nm violet light at an angle of 45.0°, Q5 asks for the wavelength of light that has its third minimum at an angle of 30.0° when falling on double slits separated by 3.00 μm, and Q6 asks for the wavelength of light falling on double slits separated by 2.00 μm if the third-order maximum is at an angle of 60.0°, Q7 asks for the angle of the fourth-order maximum in the given situation.
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