As discussed in class, photons have energy, E = hc/λ, where h is Planck’s constant and...
As discussed in class, photons have energy, E = hc/λ, where h is Planck’s constant and λ is the wavelength.
(a) The wavelength sets the smallest distance that can be resolved by the photon. Why do particle physicists want to build higher-energy accelerators to study smaller distances? If h = 4.1357×10−15 eV s, what is the value of λ for E = 1012 eV?
(b) Estimate the number of photons per second emitted by an ordinary red light bulb. Assume λ = 600 × 10−9 m and 10% of the power is converted to visible light. Note that 1 eV = 1.6 × 10−19Joules.
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As discussed in class, photons have energy, E = hc/λ, where h is
Planck’s constant and...
One watt (W) is equal to 1 J/s. Assume that 5.0% of the energy output of...
One watt (W) is equal to 1 J/s. Assume that 5.0% of the energy output of a 75 watt light bulb is visible light and that the average wavelength of the light is 550 nm, how many photons per second are emitted by the light bulb? If 5.0% of the energy of a 75 watt light bulb is visible light, then the rate of energy of all the photons emitted is J/s (3 s.f.). A 550 nm wavelength is the...
Quantum Physics - Photon Energy Electromagnetic Wave Spectrum 200 3x 3x Navegh Wand MOVES AM radie...
Quantum Physics - Photon Energy Electromagnetic Wave Spectrum 200 3x 3x Navegh Wand MOVES AM radie Fradio 10 10 10 Pre The Planck constant is 6.626x10^-34 J s. (a) Calculate the energy carried by a photon in an AM radio wave whose wavelength is 125.00 m. Write the result in terms of 10-28). Keep 4 decimal places. Enter a number x10-28, Submit (5 attempts remaining) (b) Calculate the energy carried by an X-ray photon whose wavelength is 25.00 nm, 1nm...
PHYS-1200/1250 Lab Manual Name Section 38A - Photons 1) Write Einstein's relationship between the energy of...
PHYS-1200/1250 Lab Manual Name Section 38A - Photons 1) Write Einstein's relationship between the energy of a photon and the frequency of the electromagnetic wave that characterizes the photon beam, Explain in words what cach term represents. Words Relationship Ehf histhu pian constant is the wayicha 2) What is the approximate frequency, energy, and wavelength (in meters) of a green light photon in the middle of the visible spectrum? Frequency(Hz) _Energy (Joules): 3-54X10 Energy (eV): Wavelength: 3) A beam of...
The energy of a photon of light is given by E=hf where h=6.64x10-34 J∙s is the...
The energy of a photon of light is given by E=hf where h=6.64x10-34 J∙s is the Planck constant and f is the frequency of the light. The photoelectric effect is the principle that underlies the operation of solar cells, for example the ones in your handheld calculator. Since photons of light have energy that depends on their frequency, different colours of light have different amounts of energy. Using the relationship between frequency (f), wavelength (λ), and the speed of light...
1.. Suppose that you shine light of energy 1050 kJ/mol on an H atom in the...
1.. Suppose that you shine light of energy 1050 kJ/mol on an H atom in the ground state. What happens to the light and to the electron? Group of answer choices a. The light is not absorbed and the final energy of the electron is -1312 kJ/mol. b.. The light is absorbed and the final energy of the electron is −328 kJ/mol. c.. The light is not absorbed and the final energy of the electron is −1050 kJ/mol. d.. The...
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...
A H-atom is in an excited state represented by a dot. What are the possible energies...
A H-atom is in an excited state represented by a dot. What are the possible energies of emitted photons? 10.se -3.4ev -13.6V 0.65 eV, 0.85 eV 0.85 eV, 1.9eV 3.4 eV, 1.9 eV 1.9 eV, 10.2eV 1.9 eV, 10.2eV, 12.1eV QUESTION 2 3.4ev A 12.0 eV electron collides with an H-atom in its ground state. What is the energy of the electron after the collision? -13.6ev 12.0 eV 10.5 eV 8.6 eV 1.8 eV 1.6 eV QUESTION 3 A collection...
3 (b) The energy of a Bohr atom in the n-th excited state is given by the formula E--a2mc2 2,7, where α-e2/(4πέρ,10hc)-1 /137, m is the electron mass and e denotes the electron electric charge. i) Wh...
3 (b) The energy of a Bohr atom in the n-th excited state is given by the formula E--a2mc2 2,7, where α-e2/(4πέρ,10hc)-1 /137, m is the electron mass and e denotes the electron electric charge. i) Why is the total energy negative? Explain briefly your answer. ii) What is the radius of the electron in the n-th excited state in the Bohr atom? To answer that correctly follow the next steps Use Bohr's angular momentum quantization principle to obtain an...
Quantized and total photon energy The particle characteristics of electromagnetic radiation are responsible for the quantized...
Quantized and total photon energy The particle characteristics of electromagnetic radiation are responsible for the quantized behavior of light energy. This behavior explains the results of varying the intensity and wavelength for an observed photoelectric effect, which describes the emission of electrons when light shines on a metal surface. If light only exhibited a purely wavelike behavior, then either increasing the intensity or decreasing the wavelength would both increase the rate at which electron are emitted. However, monochromatic light of...
Example 1 Calculate the energy transferred by photon (Eph or E) for a monochromatic radiation with...
Example 1 Calculate the energy transferred by photon (Eph or E) for a monochromatic radiation with wavelength of: Photon Energy hc E = a h is planck constant, C velocity of light in vaccum (m/s) and is wavelength of radiation (m) 0.4 um 1.08 um 1.8 um a) b) c) [Assume that h = 4.1358 x 10-15 eV and C = 3 x 108 m/s] Example 2 Consider a 100 cm2 photovoltaic cell with reverse saturation current lo= 10-12 A/cm2....
One watt (W) is equal to 1 J/s. Assume that 5.0% of the energy output of a 75 watt light bulb is visible light and that the average wavelength of the light is 550 nm, how many photons per second are emitted by the light bulb? If 5.0% of the energy of a 75 watt light bulb is visible light, then the rate of energy of all the photons emitted is J/s (3 s.f.). A 550 nm wavelength is the...
Quantum Physics - Photon Energy Electromagnetic Wave Spectrum 200 3x 3x Navegh Wand MOVES AM radie Fradio 10 10 10 Pre The Planck constant is 6.626x10^-34 J s. (a) Calculate the energy carried by a photon in an AM radio wave whose wavelength is 125.00 m. Write the result in terms of 10-28). Keep 4 decimal places. Enter a number x10-28, Submit (5 attempts remaining) (b) Calculate the energy carried by an X-ray photon whose wavelength is 25.00 nm, 1nm...
PHYS-1200/1250 Lab Manual Name Section 38A - Photons 1) Write Einstein's relationship between the energy of a photon and the frequency of the electromagnetic wave that characterizes the photon beam, Explain in words what cach term represents. Words Relationship Ehf histhu pian constant is the wayicha 2) What is the approximate frequency, energy, and wavelength (in meters) of a green light photon in the middle of the visible spectrum? Frequency(Hz) _Energy (Joules): 3-54X10 Energy (eV): Wavelength: 3) A beam of...
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...
A H-atom is in an excited state represented by a dot. What are the possible energies of emitted photons? 10.se -3.4ev -13.6V 0.65 eV, 0.85 eV 0.85 eV, 1.9eV 3.4 eV, 1.9 eV 1.9 eV, 10.2eV 1.9 eV, 10.2eV, 12.1eV QUESTION 2 3.4ev A 12.0 eV electron collides with an H-atom in its ground state. What is the energy of the electron after the collision? -13.6ev 12.0 eV 10.5 eV 8.6 eV 1.8 eV 1.6 eV QUESTION 3 A collection...
3 (b) The energy of a Bohr atom in the n-th excited state is given by the formula E--a2mc2 2,7, where α-e2/(4πέρ,10hc)-1 /137, m is the electron mass and e denotes the electron electric charge. i) Why is the total energy negative? Explain briefly your answer. ii) What is the radius of the electron in the n-th excited state in the Bohr atom? To answer that correctly follow the next steps Use Bohr's angular momentum quantization principle to obtain an...
Quantized and total photon energy The particle characteristics of electromagnetic radiation are responsible for the quantized behavior of light energy. This behavior explains the results of varying the intensity and wavelength for an observed photoelectric effect, which describes the emission of electrons when light shines on a metal surface. If light only exhibited a purely wavelike behavior, then either increasing the intensity or decreasing the wavelength would both increase the rate at which electron are emitted. However, monochromatic light of...
Example 1 Calculate the energy transferred by photon (Eph or E) for a monochromatic radiation with wavelength of: Photon Energy hc E = a h is planck constant, C velocity of light in vaccum (m/s) and is wavelength of radiation (m) 0.4 um 1.08 um 1.8 um a) b) c) [Assume that h = 4.1358 x 10-15 eV and C = 3 x 108 m/s] Example 2 Consider a 100 cm2 photovoltaic cell with reverse saturation current lo= 10-12 A/cm2....
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