Homework Answers
The stimulated emission of photons from the excited atoms in a gas laser is prompted by - nearby presence of photons of same wavelength as those emitted. Basic principal of working of laser is basically to excite the atoms to higher energy levels and then stimulate them with the help of photons of nearly same nergy to dexcite and emit a large flux of photons.
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The stimulated emission of photons from the excited atoms in a gas laser is prompted by...
Photons can be emitted from atoms by heating them up, where electrons are excited to higher...
Photons can be emitted from atoms by heating them up, where electrons are excited to higher energy states by thermal excitations and they subsequently decay to lower states releasing photons. Would it be possible to use the same method in practice in order to obtain photons as a result of the nuclear transitions? Explain how and why. Which temperature would be needed for that?
6. A stream of laser photons with a frequency of 3.0x1015 Hz excited electrons in the...
6. A stream of laser photons with a frequency of 3.0x1015 Hz excited electrons in the lowest energy of the hydrogen atom shown in the energy level diagram below Energy a. Show to what level the photon excited the electron. -6.02x10-20 -8.72x10 b. Show all the possible emission transitions as the 1.36x10-19J state. tron returns from the n = 3 energy level to the ground 242x1-19 c. Calculate AE for each line produced in b. -5.45x1019 -2.18x101 d. What is...
5. (2 points) How many photons are emitted from neon gas if all the atoms of...
5. (2 points) How many photons are emitted from neon gas if all the atoms of a 20.18 g sample relax from an n 6 excited state back to an n 1 ground state? A. 7.221 x 1024 B. 6.022 x 102 C. 5.022 x 1022 D. 3.011 x 1024 E. 1.507 x 103
Electrons with energy 13.0eV are fired at Hydrogen atoms in a gas discharge tube. (a) How...
Electrons with energy 13.0eV are fired at Hydrogen atoms in a gas discharge tube. (a) How many different spectral lines could be emitted by the Hydrogen atoms? (b) Determine the minimum wavelength spectral line that can be emitted from the Hydrogen atoms. (c) What are the energies of the photons produced in the transition in part (b)?
Choose the right answers a)What is responsible for the production of x ray emission at the...
Choose the right answers a)What is responsible for the production of x ray emission at the cutoff wavelength? 1)The last emission in a series of many emissions by the incident electron as it loses its energy. 2)The first emission in a series of many emissions by the incident electron as it loses its energy. 3)The most energetic emission in a series of many emissions by the incident electron as it loses its energy. 4)The least energetic emission in a series...
A sample of monoatomic hydrogen gas contains 100 atoms and all the atoms are in nth...
A sample of monoatomic hydrogen gas contains 100 atoms and all the atoms are in nth excited state As the atoms come down to the ground state following various transitions, they release a total energy of 1500 Rch IRch -13.6eV]. The maximum possible number of photons emitted in the process s 49 A) 150 C) 4200 B) 2100 D) 6300
Which of the statements about properties of emission spectra is FALSE? (select only one of the...
Which of the statements about properties of emission spectra is FALSE? (select only one of the following): A. If elements are in the same group, they will have the same emission spectra. B. An emission spectrum for a single element will always have clear areas of no emitted light. C. Electrons of an atom must be excited to produce an emission spectrum. D. Hydrogen produces the simplest emission spectrum.
(b) Light oF a certain wavelength is just able to cause the emission of photoelectrons with...
(b) Light oF a certain wavelength is just able to cause the emission of photoelectrons with close to zero velocity from silver whose work-function is 4,73 electron-volts. The same light is now shone on to a sodium surface whose work-function is 2,46 e-V. Calculate the energy of the electrons which are emitted, in electron-volts. [6] (c) The electron in a Bohr hydrogen atom has been excited to the n = 3 state. (I) Sketch on a labelled energy level diagram...
9. What is the property of a laser called that causes coherent light to be emitted?...
9. What is the property of a laser called that causes coherent light to be emitted? A. population inversion B. light amplification C. monochromaticity D. stimulated emission 10. Which of the following is not an essential, component of a laser? F. a partially transparent mirror G. a fully reflecting mirror H. a converging lens J. an active medium
Activity 26-5. Atomic spectra [Accompanies Section 26-5] A certain type of atom (not hydrogen) has three...
Activity 26-5. Atomic spectra [Accompanies Section 26-5] A certain type of atom (not hydrogen) has three energy levels numbered 1, 2, and 3, as shown in the upper illustration. There are three possible transitions between these levels that lead to emission of a photon: 3 → 1, 3 → 2, and 2 → 1. The lower illustration shows the emission spectrum from a gas of these atoms. There are three emission lines, A, B, and C. (a) Rank the photons...
6. A stream of laser photons with a frequency of 3.0x1015 Hz excited electrons in the lowest energy of the hydrogen atom shown in the energy level diagram below Energy a. Show to what level the photon excited the electron. -6.02x10-20 -8.72x10 b. Show all the possible emission transitions as the 1.36x10-19J state. tron returns from the n = 3 energy level to the ground 242x1-19 c. Calculate AE for each line produced in b. -5.45x1019 -2.18x101 d. What is...
5. (2 points) How many photons are emitted from neon gas if all the atoms of a 20.18 g sample relax from an n 6 excited state back to an n 1 ground state? A. 7.221 x 1024 B. 6.022 x 102 C. 5.022 x 1022 D. 3.011 x 1024 E. 1.507 x 103
A sample of monoatomic hydrogen gas contains 100 atoms and all the atoms are in nth excited state As the atoms come down to the ground state following various transitions, they release a total energy of 1500 Rch IRch -13.6eV]. The maximum possible number of photons emitted in the process s 49 A) 150 C) 4200 B) 2100 D) 6300
(b) Light oF a certain wavelength is just able to cause the emission of photoelectrons with close to zero velocity from silver whose work-function is 4,73 electron-volts. The same light is now shone on to a sodium surface whose work-function is 2,46 e-V. Calculate the energy of the electrons which are emitted, in electron-volts. [6] (c) The electron in a Bohr hydrogen atom has been excited to the n = 3 state. (I) Sketch on a labelled energy level diagram...
9. What is the property of a laser called that causes coherent light to be emitted? A. population inversion B. light amplification C. monochromaticity D. stimulated emission 10. Which of the following is not an essential, component of a laser? F. a partially transparent mirror G. a fully reflecting mirror H. a converging lens J. an active medium
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