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In the photo-electric effect, the minimum energy required for a single photon to be able to...
Consider a photoelectric effect experiment. Calculate the minimum photon energy needed to produce photoelectrons for the...
Consider a photoelectric effect experiment. Calculate the minimum photon energy needed to produce photoelectrons for the following metals: Sodium Aluminum Platinum For the photon energies you calculated in problem #1, calculate the wavelength and frequency for each. In what part of the electromagnetic spectrum do these photons belong? Calculate the radii and energies of the first three allowed orbits for the Bohr Model of the hydrogen atom in both joules and electron-volts. Show your work. Calculate the energies of photons...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into electricity are called photo-voltaic cells and use the photo-electric effect to generate their electricity. a. Classical wave theory stated that by increasing the intensity (amount) of light, that each electron would have more kinetic energy, however experiments showed that increasing the intensity increased the number of electrons released, but not the amount of energy each electron had. Why is this so? b. A photon...
Calculate the energy of a photon required to excite a hydrogen atom from the n =...
Calculate the energy of a photon required to excite a hydrogen
atom from the n = 1 state to the n = 2 state.
10. [1pt] Calculate the energy of a photon required to excite a hydrogen atom from the - 1 state to the n - 2 state, Answer: Submit All Answers 11. [1pt] An electron in a hydrogen atom falls to an energy level n = 2. If the wavelength of the emitted electromagnetic radiation is 4.86x10m, what...
Quantum Physics - Photoelectric Effect 1 Light Light2 Photo- electrons KEL KEN-W Photoelectric Effect Lenard found...
Quantum Physics - Photoelectric Effect 1 Light Light2 Photo- electrons KEL KEN-W Photoelectric Effect Lenard found that light has to be above a certain frequency in order to observe photoelectrons The Planck constant is 6.626x10^-34 J s. The calcium metal has a work function WO = 2.71 eV, 1eV = 1.6x10^-19). (a) What is the Cutoff frequency for the calcium metal? Write the result in terms of 1014Hz. Keep 3 decimal places. Enter a number x1024Hz Submit (5 attempts remaining)...
33.8 Problems biting the atom drops from an energy level of Ei--10.64 eV to an energy...
33.8 Problems biting the atom drops from an energy level of Ei--10.64 eV to an energy level of 12.70 eV 33.1 A photon is emitted by an atom when one of the electrons or- (a) What is the energy of this photon (in eV)? (b) What is the energy of this photon (in D? (c) What is the frequency of this photon? (d) What is the wavelength of this photon? (e) What is the momentum of this photon? 33.2 The...
(a) What energy (in eV) would a photon have, if it were emitted when an electron...
(a) What energy (in eV) would a photon have, if it were emitted when an electron dropped from the n = 5 level to n = 2? 2.865 eV (b) The equation for a photon's energy can be written: Echo where h is known as Planck's constant and is equal to 4.136 x 10-15 eV · s. (Note that h has a different numerical value in SI units.) Since we know that for light © = f, we can rewrite...
The photoelectric effect demonstrates the quantized nature of light. a) What is the kinetic energy and...
The photoelectric effect demonstrates the quantized nature of light. a) What is the kinetic energy and speed of an electron ejected from a Na surface with work function 2.28 eV when illuminated by light of wavelength i) 410 nm ii) 600 nm? b) What is the critical frequency fo of incident light below which no electrons are ejected? c) Sketch a graph of kinetic energy of the ejected electron vs. frequency of incident light for the photoelectric effect in sodium....
A He-Ne gas laser pulse with a wavelength of 594 nm contains 4.15 mJ of energy....
A He-Ne gas laser pulse with a wavelength of 594 nm contains
4.15 mJ of energy. a) How many photons are contained in one laser
pulse? x10a photons a = b) Titanium metal has a work function
(LaTeX: \Phi Φ ) of 4.33 eV. Is this laser pulse able to eject an
electron from the surface of titanium? (yes / no) c) Show that this
pulse can eject an electron from cesium (LaTeX: \Phi Φ = 1.97 eV).
Upload a...
Consider the energy levels for Hydrogen in the table below: (note the energy is relative to...
Consider the energy levels for Hydrogen in the table below: (note the energy is relative to the energy necessary for an electron to escape. So for Level n = 1 the electron would need to gain 13.6 electron volts to no longer be negative and thus able to escape the atom!) Level (n = ) Energy (in eV) 1 -13.6 2 -3.40 3 -1.51 4 -0.850 5 -.544 6 -.378 What would be the energy of a photon emitted when...
An X-ray photon scatters from a free electron at rest at an angle of 105 relative...
An X-ray photon scatters from a free electron at rest at an angle of 105 relative to the incident direction Part A If the scattered photon has a wavelength of 0.340 nm, what is the wavelength of the incident photon? Express your answer using three significant figures. IVO ACO ? = nm Submit Request Answer Part B Determine the energy of the incident photon. Express your answer using three significant figures. ΤΡΙ ΑΣΦ ? EN keV Submit Request Answer Part...
Consider a photoelectric effect experiment. Calculate the minimum photon energy needed to produce photoelectrons for the following metals: Sodium Aluminum Platinum For the photon energies you calculated in problem #1, calculate the wavelength and frequency for each. In what part of the electromagnetic spectrum do these photons belong? Calculate the radii and energies of the first three allowed orbits for the Bohr Model of the hydrogen atom in both joules and electron-volts. Show your work. Calculate the energies of photons...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into electricity are called photo-voltaic cells and use the photo-electric effect to generate their electricity. a. Classical wave theory stated that by increasing the intensity (amount) of light, that each electron would have more kinetic energy, however experiments showed that increasing the intensity increased the number of electrons released, but not the amount of energy each electron had. Why is this so? b. A photon...
Calculate the energy of a photon required to excite a hydrogen
atom from the n = 1 state to the n = 2 state.
10. [1pt] Calculate the energy of a photon required to excite a hydrogen atom from the - 1 state to the n - 2 state, Answer: Submit All Answers 11. [1pt] An electron in a hydrogen atom falls to an energy level n = 2. If the wavelength of the emitted electromagnetic radiation is 4.86x10m, what...
Quantum Physics - Photoelectric Effect 1 Light Light2 Photo- electrons KEL KEN-W Photoelectric Effect Lenard found that light has to be above a certain frequency in order to observe photoelectrons The Planck constant is 6.626x10^-34 J s. The calcium metal has a work function WO = 2.71 eV, 1eV = 1.6x10^-19). (a) What is the Cutoff frequency for the calcium metal? Write the result in terms of 1014Hz. Keep 3 decimal places. Enter a number x1024Hz Submit (5 attempts remaining)...
33.8 Problems biting the atom drops from an energy level of Ei--10.64 eV to an energy level of 12.70 eV 33.1 A photon is emitted by an atom when one of the electrons or- (a) What is the energy of this photon (in eV)? (b) What is the energy of this photon (in D? (c) What is the frequency of this photon? (d) What is the wavelength of this photon? (e) What is the momentum of this photon? 33.2 The...
(a) What energy (in eV) would a photon have, if it were emitted when an electron dropped from the n = 5 level to n = 2? 2.865 eV (b) The equation for a photon's energy can be written: Echo where h is known as Planck's constant and is equal to 4.136 x 10-15 eV · s. (Note that h has a different numerical value in SI units.) Since we know that for light © = f, we can rewrite...
A He-Ne gas laser pulse with a wavelength of 594 nm contains
4.15 mJ of energy. a) How many photons are contained in one laser
pulse? x10a photons a = b) Titanium metal has a work function
(LaTeX: \Phi Φ ) of 4.33 eV. Is this laser pulse able to eject an
electron from the surface of titanium? (yes / no) c) Show that this
pulse can eject an electron from cesium (LaTeX: \Phi Φ = 1.97 eV).
Upload a...
An X-ray photon scatters from a free electron at rest at an angle of 105 relative to the incident direction Part A If the scattered photon has a wavelength of 0.340 nm, what is the wavelength of the incident photon? Express your answer using three significant figures. IVO ACO ? = nm Submit Request Answer Part B Determine the energy of the incident photon. Express your answer using three significant figures. ΤΡΙ ΑΣΦ ? EN keV Submit Request Answer Part...
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