Concept explainers
The energy of the photon when a hydrogen atom undergoes a spin-flip transition, and the number of protons that would be required to match the energy of a singlethe
Answer to Problem 17Q
The energy of the photon emitted after the snip flip transition of the hydrogen atom is
Explanation of Solution
Given:
The wavelength of the photon is,
The value of the plank’s constant is,
The wavelength of the photon after an hydrogen atom undergoes the snip flip transition is,
Formula used:
The expression for the energy at the spin flip of transition of the photon is given by,
The expression for the energy of
The number of photons undergoing snip flip transition required for the same energy as
Calculation:
The expression for the energy at the spin flip of transition of the photon is calculated as,
The expression for the energy of
The number of photons undergoing snip flip transition required for the same energy as
Conclusion:
The energy of the photon emitted after the snip flip transition of the hydrogen atom is
Want to see more full solutions like this?
Chapter 22 Solutions
Universe: Stars And Galaxies
- Would you expect to be able to detect an H II region in X-ray emission? Why or why not? (Hint: You might apply Wien’s law)arrow_forwardWhat wavelength photon would be required to ionizea hydrogen atom in the ground state and give the ejectedelectron a kinetic energy of 11.5 eV?arrow_forwardUsing Wien's Law for two black body objects with a temperature of 1000 K (fire) and 290 K (background), at what central wavelengths are the two objects radiating?arrow_forward
- Calculate the wavelength at which an astronaut's radio must be tuned to sense signals from electrons From level 273 = n to level 272 = n.?arrow_forwardCalculate the total number density ( ntot ) and the density ( ρ ) at a depth in a star composed of pure hydrogen where T = 9500 K and 35 % of the atoms are ionized (assume UI = 2). What percentage of hydrogen atoms are in the energy level n = 2?arrow_forwardSuppose we detect red photons at 656 nm emitted by electrons dropping from the n = 3 to the n = 2 orbital in hydrogen. The hydrogen is in an interstellar cloud at 5000k. If the cloud were heted to 10000 K, what would be the wavelength of the photons emitted by the transition? a) 328 nm b) 656 nm c) 1312 nm d) 658 nm e) 654 nmarrow_forward
- Need help using Boltzmann's constant. If i'm trying to find average thermal velocity (Vrms) of a water droplet (spherical) and i'm given radius = 10^-6 m at 293.15 K, and the density of water is 0.997 g/mL (997 kg/m^3), how would i go about finding the Vrms? The droplet can also be treated as an ideal gas particle.arrow_forwardsuppose we detect red photons at 102.57 nm emitted by electrons dropping from the n=3 to the n= 1 orbital in hydrogen. If the temperature of the cloud doubled, what would be the wavelength photo of the photons emitted by the transition?arrow_forwardWhat do the results from the Wilkinson Microwave Anisotropy Probe (WMAP) observations tell cosmologists?arrow_forward
- What is the total energy of all the radiation in the current Hubble Radius? H0 = 70 km/s/Mps omega(radation) 0 = 9.0 x 10^-5arrow_forwardAt what rate does the Sun emit photons? For simplicity, assume that the Sun’s entire emission at the rate of 3.9 * 10^26 W is at the single wavelength of 550 nm.arrow_forwardIn hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. Find the speed for a star in which this line appears at wavelength 120.5 mm. What about at 122.4 nm? Express your answer to three significant figures and include the appropriate units.arrow_forward
- Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningStars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
- AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStaxModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning