Question 2.4: A material is in thermodynamic equilibrium at room temperature (300°K).The wavelength of the photon emitted in the transition between two levels is 0.5 µm (visible radiation). Calculate the ratio of the population numbers for these energy levels.
Q: (b) What is the surface temperature of the star? 4274.3 X K (c) At what rate is energy emitted from…
A: b) The star’s surface temperature can be determined by Wein’s displacement law as, Here, T, b, and…
Q: on has a momentum of 8.5 × 10-21 kg⋅m/s. What is its wavelength in meters? Calculate its energy in…
A: GivenMomentum of photon, p=8.5×10-21 kg m/s
Q: The two nuclei in the carbon monoxide (CO) molecules are 0.1128 nm apart. The mass of the carbon…
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Q: Through what potential difference ΔVΔV must electrons be accelerated (from rest) so that they will…
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Q: A metal absorbing a photon with energy 6.00 eV emits an electron that carries an initial kinetic…
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Q: A particular blackbody has a radiation spectrum that peaks at a wavelength of 660 nm. Part (a)…
A: Given, Wavelength = 660 nm We need to calculate, (a) Temperature =? (b) If temperature =4300K…
Q: A measurement is made of a photon’s energy (from a laser) that results in an uncertainty in the…
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Q: Suppose someone is running a fever of 102.0° F (average being 98.6° F). How much more power (in…
A: The intensity of the radiation emitted by a hot body can be given by Stefan Boltzmann law as, Here,…
Q: Will the photocell function (electrons be released) with this wavelength of light?
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Q: The radius of our sun is r = 6.96 × 108 m and its total power is 3.85 × 1026 W. The area of a sphere…
A: Given that the radius of the sun and area of the sphere and total power is also given. Then We have…
Q: The total power radiated per unit area from a blackbody is 78.0 MW/m2. Find (a) the temperature of…
A: Power per unit area, P = 78 MW/m2
Q: Early researchers were very excited when they were able to predict the energy of an electron at a…
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Q: The intensity of blackbody radiation peaks at a wavelength of 583 nm. (a) What is the temperature…
A: The wavelength of the radiation is 583 nm.
Q: 3.2. A photon of wavelength 350 nm and intensity 1.00 W/m² is directed at a potassium surface, with…
A: Part (a): Maximum Kinetic Energy of the Emitted PhotoelectronsStep 1: Calculate the frequency of the…
Q: In the spectrum described below, lines are indicated that were created as a result of photon…
A: The energy levels of hydrogen-like atoms are given byEn=−13.6Z2n2eVwhere n refers to the level and…
Q: Consider a photon with wavelength 0.011 nm. l = 0.011 nm What is the momentum of the photon in…
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Q: A proton is moving at a speed of 2.59 × 107 m/s. The mass of a proton is 1.67 × 10–24 g. Calculate…
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Q: Consider an experiment where a Blackbody (Blackbody radiation) is studied. The radiators are heated…
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Q: X-ray diffraction: (a) Determine the maximum wavelength for which Bragg reflection can be observed…
A: Given, the lattice constant of cubic crystal is, a=3.6A. For constructive interference, in Bragg's…
Q: Suppose an infrared photon has a frequency of 2.2 × 1013 Hz. Part (a) Calculate the energy, in…
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Q: What is the energy of a photon with a frequency of 7.4*10^15 Hz?
A: Given data: Frequency of photon (υ) = 7.4 × 1015 Hz Required: The energy of photon
Q: A black body has an area of 10.0 cm2 what is the power radiated when its temperature is 5000 K.
A: Power radiated by a black body is given by, P=σAeT4 Here σ is Stefan's constant, A is the surface…
Q: A laser emits light at wavelength A = 598 nm in a beam of diameter 3.7 mm and at an energy-emission…
A: Given Wavelength λ = 598 nm = 5.98×10-7 m Diameter d = 3.7mm = 3.7×10-3 m Energy-emission rate P =…
Q: X-rays with a wavelength of 4 =9.587pm are used in a Compton scattering experiment (i.e. the photons…
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Q: The power emitted by a blackbody is proportional to T^4. If the temperature of the blackbody goes…
A: It is given that power emitted by blackbody is proportional to T4 .
Q: An excited electron drops to its ground state, emitting a photon of frequency f = 5.10×1015 Hz. What…
A: Given data The frequency is f=5.10×1015 Hz The energy of the photon is, E=hf Here h is Planck's…
Q: Suppose a star with radius 8.51 108 m has a peak wavelength of 689 nm in the spectrum of its…
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Q: A laser emits a pulse of light that lasts 10 ns. The light has a wavelength of 690 nm, and each…
A: Given : t = 10 ns = 10 × 10-9 s λ = 690 nm = 690 × 10-9 m E = 480 mJ = 0.480 J 1 eV = 1.60 × 10−19 J…
Q: The walls of a blackbody cavity are at a temperature of 30oC. What is the wavelength of the…
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Q: Radiation has been detected from space that is characteristic of an ideal radiator at T = 2.728 K.…
A: Weins displacement law is λmT=2.90×10-3 mK Here, λm is the wavelength corresponding to maximum…
Q: Part A: If X=2.44 micrometers, what is the surface temperature of object A? Enter the numerical…
A: (a) From the graph, the maximum intensity of radiation from object A occurs at X. λpeak=X Here,…
Q: 3.9. The stopping potential when a frequency of 1.61×1015 Hz is shone on a metal is 3V. (a) What is…
A: 1. What is the energy transferred by each photon?To find the energy transferred by each photon, we…
Q: (prt 1)A photon emitted as a hydrogen atom undergoes a transition from the n = 4 state to the n = 2…
A: 1. The energy of the emitted photon is E=-13.6 eVn2∆E=-13.6 eV42--13.6 eV22=2.55 eV1.6×10-19 J1…
Q: Find the frequency of the photon emitted when hydrogen makes a transition between energy level 6 to…
A: Given,h = 6.62×10-34 m2kg/sc = 3×108 m/sEnergy, E = -13.6n2E6 = -13.662E6 = -0.377 eVE4 = -0.85 eV∆E…
Q: Consider a material that is well approximated by a black body. The max. emitted irradiance is found…
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- A photon has 1.86 eV of energy. What is the photon’s wavelength? (h = 6.626 x 10-34, 1 eV = 1.6 x 10-19 J)A 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?Suppose a star with radius 8.57 × 108 m has a peak wavelength of 680 nm in the spectrum of its emitted radiation. (a) Find the energy of a photon with this wavelength. J/photon (b) What is the surface temperature of the star? K (c) At what rate is energy emitted from the star in the form of radiation? Assume the star is a blackbody (e = 1). W (d) Using the answer to part (a), estimate the rate at which photons leave the surface of the star. photons/s
- The 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 isQuantum Dot: Patent number 833-896-398 is for a quantum dot that only emits and absorbs three wavelengths of light. The quantum dot is engineered to have three different electron energy levels: E₁ = 0.51 eV, E2 = 2.99 eV, and E3 = 4.83 eV. The quantum dot only contains a single electron. What three wavelengths of light will this quantum dot will absorb and emit?A nickel crystal’s work function is measured to be 5.22 eV at 25°C. As the temperature increases by 300°C, the work function drops by 50 meV. By how much does this shift the threshold wavelength for photoelectric emission?
- What is the wavelength of a photon emitted when an electron jumps from the n=3 to the n=2 energy levels of a lithium atom (Z=3)? Express your answer in nanometers and keep three significant digits.A photon having a wavelength of 182 nm strikes the surface of a metal sheet having a threshold frequency (νo) of 9.27 x 1014 s-1. Calculate the velocity of the ejected electron in SI units AND in units of miles per hour. Hint: Combine equations 1.3 (pg 16 of textbook) and 3.6 (pg. 94). Report the units of your answer.The work function of aluminum is 4.26 ev. What is the maximum velocity of an electron emitted from aluminum after the absorption of a photon of wavelength 117 nm. Give your answer in m/s. Round your answer to 2 decimal places. Add your answer Question 10 A photon Compton scatters from an electron. At what scattering angle for the photon will the electron acquire the largest kinetic energy? 45 degrees 90 degrees C o degress D 180 degrees