H. The 6563 Å a line emitted by hydrogen in a star is found to be red shifted by 15 Å. Estimate the speed with which the star is receding from the Earth.
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- What is the wavelength (in m) of a 2.06 eV photon? Find its frequency in hertz.A 610 keV gamma ray is incident on an electron at rest. If the scattered photon has a scattering angle of 112° with respect to the direction of the incident photon, determine the following. (a) Energy (in keV) of the scattered photon 2.094 How can you determine the wavelength and hence energy of the scattered photon? keV (b) Kinetic energy (in keV) of the scattered electron 40.2 How is the energy of the scattered electron related to the energy of the incident and scattered photons? ke (c) Recoil angle (in degrees) of the scattered electron 112 x Is momentum conserved during this process? How can you determine the momentum of the scattered photon and electron?°Another theory of dark matter (there are many theories!) predicts that there is a particle in the dark sector that is similar to the photon but has a small nonzero mass, which we call the dark photon. The dark photon does not move at the speed of light, but slightly slower, at a speed that depends on the wavelength. If the mass of the dark photon is 10-15 eV/c², what is the wavelength of a dark photon that moves at a speed that is 99% the speed of light? 7
- 3. Find the momentum of (a) a 10.0-MeV gamma ray; (b) a 25-keV X ray; (c)a1.0-µm infrared photon; (d) a 150-MHz radio-wave photon. Express the momentum in kg -m/s and eV/c.l5.b Please provide a correct and well explanied solution for the followingQuantum mechanics (Black Body Radiation) Use both languages: English (50 words max) and Math, when appropriate. a) What is an ideal black body? b) Give two examples for situations when the emitted radiation can be treated as a black body ration
- 16. 23 567 Electron in 6th excited state in Li** (at rest) jumps. to 2nd excited state. h, R, m are Planck's constant, Rydberg constant, mass of Li (ion). Find the speed acquired by Litt (ion). ++ ++ 3hR 3hR (1) (2) 4m 8m 40 hR 36 hR (3) j (4) 49 m 98 mAssume an object is emitting blackbody radiation. The peak of a body's blackbody radiation curve shifts upward as the temperature of the body increases. True FalseSuppose a proton is moving at 1.25 % of the speed of light. a)Calculate the wavelength, in meters, of a photon that has the same momentum as this proton. b) What is the energy of the photon, in megaelectron volts? c) What is the kinetic energy of the proton, in megaelectron volts?
- Orthogonal Polarizations. Show that if two elliptically polarized states are orthogonal, the major axes of their ellipses are perpendicular and the senses of rotation are opposite.c) Max Planck proposed his constant h to relate the energy of a photon to its frequency. Calculate the energy in eV of red light of wavelength 620 nm.Based on your answer in Question 7, when light with a wavelength of 198 nm strikes the surface of tin metal, electrons are ejected with a maximum kinetic energy of 2.9 x 10-19 J. What is the binding energy of these electrons to the metal? A 1.2 x 10-18 ) B 1.0 x 10-18 J С) 7.1 х 10-19] 1.98 x 10-7J