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Q: Find ratio of spontaneous to stimulated emission for a cavity of temperature 50k and wavelength…
A: The ratio of spontaneous to stimulated emission in a cavity is given by the Boltzmann factor, which…
Q: Use the thermodynamic identity dU = TdS - PdV to show that the energy density of a photon gas is…
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Q: 4) D 40 20 B, Rtot Itot = Vot I = 70 IA VA = IB VB = Vc = Ip Vp I = VE = 30 12 V (+1) Show working…
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Q: Consider a black body of surface area 20.0 cm² and temperature 5 000 K. How much power does it…
A: Stefan's Boltzmann law describes the power radiated from a blackbody from its temperature. It states…
Q: We know that an incandescent lamp filament at 2500 K radiates white light. Does the lamp filament…
A: A lamp filament will emit radiation energy at all temperatures higher than absolute zero. The peak…
Q: (a) Derive the Compton Formula hv (b) If is the angle that the electron trajectory makes with the…
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Q: Which of the graphs below gives the correct qualitative behavior ofthe energy density E, (2) of…
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Q: What is the minimum possible temperature ? Is there also a maximum possible temperature?
A: Temperature can is defined as a phenomenon which occurs due to the vibration of molecules.Minimum…
Q: Use the thermodynamic identity ?? = ??? − ??? to show that the energy density of a photon gas is…
A: The objective of the question is to demonstrate that the energy density of a photon gas is…
Q: An accelerating voltage of 8 keV was used for the EDX (Energy dispersive x-ray analysis) analysis of…
A: Solution:- Energy‐dispersive X‐ray spectroscopy (EDX) is a surface analytical technique…
Q: incident on a When radiation of wavelength 1500A is photocell, elections are emitted. It stopping…
A: The stopping potential gives the maximum value of kinetic energy of ejected electrons. Hence,…
Q: A beam of 7.7-MeV a particles scatters from a gold foil of thickness o 0.32 μm. What fraction of the…
A: Given : The energy of α particles = 7.7Mev thickness of gold foil = 0.32μm
Q: (a) Find the de Broglie wavelength of a nitrogen molecule in air at room temperature (293 K). (b)…
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Q: The de Broglie wave length of a neutron which is in thermal equilibrium at temperature T is ?
A: Mass of the neutron m = 1.6*10-27 kg Boltzmann's constant k = 1.38*10-23 m2 kg s-2 K-1 Planks…
Q: Explain – based solely on thermodynamic considerations – why the energy density of a photon cavity…
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Q: Two treads balls with masses 2 kilogram and three kilograms are suspended on threads of 70…
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Q: Two different gases can have the same emission spectrum. O True False
A: In an emission spectra, each line represents a specific wavelength. This is unique for a given…
Q: The spectral emittance of a radiating cavity is maximal at a wavelength of 32 μm. The temperature is…
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Q: What is the minimum and maximum scattered photon energy in a Compton collision? Calculate
A: Answer : We know from concept of Compton scattering, the wavelength shift or Compton shift due to…
Q: There are two versions of the Rydberg equation. One constant is 1.097 x 107 m -1 and the other…
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Q: Use the uncertainty principle to show that if an electron were confined inside an atomic nucleus of…
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A systemic entropy that produces blackbody radiation
It is given with the formula (£ constant)
Find the temperature of the glow and show that the equation of state is (pV=£/3)
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- Above what temperature all bodies radiate electromagnetic radiation ?Consider two large parallel surfaces. The one on the leftis at T1 = 298 K and has emissivity e =1.0 . The one on theright is at T2 = 77 K and has emissivity e = 0.70 . What is thenet flux of energy from the hotter to the colder surface. (Hint:a surface absorbs a fraction e of the photons incident on it andreflects the rest.)In a dark laboratory, a small non-reflective box is levitated by a laser with fre- quency f that is aimed vertically upward. The cross-sectional area of the box is half the cross-sectional area of the laser. (a) If the laser emits 20W of power and the box is stationary in the air, what is the mass of the box? (b) How many photons does the laser emit every second? (c) Assuming the light from the laser is originally unpolarized, suppose that a polarizer is placed in the path of the laser. Now replace by non-reflective box by a reflective box. What must the mass of the reflective box be so that it is also stationary in the air?