1. With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible whenthe path difference is increased up to 10 m. Calculate the coherence length, coherencetime and the spectral half width for He-Ne laser.-20at2. The relative population of atoms in two energy levels E1 and E2 is 10thermal equilibrium. Calculate the energy level difference in electron-volts. Assumetcmperature to be 300 K.3. A mercury vapour lamp emits in the green portion of electromagnetic spectrum ata wavelength of 546.1 nm with emission bandwidth of 6 × 10% Hz. Calculate thecoherence length for mercury vapour lamp.4. Calculate the coherence length for CO2 laser whose line width is 10emission wavelength of 10.6 µm.-5nm at IR

Given: The wavelength of light = 11.5 x 10-7 m Path difference = 10 m

1. With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible when the path difference is increased up to 10 m. Calculate the coherence length, cohcrence time and the spectral half width for He-Ne laser. -20 2. The relative population of atoms in two energy levels E1 and E2 is 10- thermal equilibrium. Calculate the energy level difference in clectron-volts. Assume temperature to be 300 K. at 3. A mercury vapour lamp emits in the green portion of electromagnetic spectrum at a wavelength of 546.1 nm with emission bandwidth of 6 × 10$ Hz. Calculate the coherence length for mercury vapour lamp. 4. Calculate the coherence length for CO2 laser whose line width is 10-5 nm at IR. emission waveclength of 10.6 µm.

1. With a He-Ne laser of wavelength 11.5x 10-7 m, fringes remain clearly visible when the path difference is increased up to 10 m. Calculate the coherence length, cohcrence time and the spectral half width for He-Ne laser. -20 2. The relative population of atoms in two energy levels E1 and E2 is 10- thermal equilibrium. Calculate the energy level difference in clectron-volts. Assume temperature to be 300 K. at 3. A mercury vapour lamp emits in the green portion of electromagnetic spectrum at a wavelength of 546.1 nm with emission bandwidth of 6 × 10$ Hz. Calculate the coherence length for mercury vapour lamp. 4. Calculate the coherence length for CO2 laser whose line width is 10-5 nm at IR. emission waveclength of 10.6 µm.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Ic h on or 1. (a) State Planck's theory of quantum radiation. (b) The plot of stopping potential versus the frequency of light used in an experiment on photographic effect is shown in figure. Calculate.i) work function and ii) the ratio h/e. (c) Write properties of photon. V (in volta) 2 1656 2. (a) What 1- 0 2 fo are 4 5 f(in 1044 Hz) Ans: 0.414, 4.14 x 10-¹5 eVs electrons actric ce adium. Wha Einstein's various te of sodium frequency h=6.6x (a) What
"One atom with three energy levels" breifly explain the roles of spontaneous and stimulated emission in the amplification of light in the optical cavity. Make it clear why both are important.
Can Please Help Me: Photon Interactions and Wave Nature of Matter/Modern Physics/Physics 60 minutes only the given time. Wish you could help me. I will give UPVOTE and GOOD FEEDBACK. //Question Use the relationship between classical kinetic energy and momentum to find the de Broglie wavelength of an electron that has an energy of (a) 26 eV, (b) 126 eV, (c) 1254 eV. //Question
4. Briefly explain the motion of carriers in semiconductor materials (i) when there is no electricfield, (ii) when there is electric field, and (iii) when there is illumination.5. Briefly explain how the absorption coefficient and absorption depth change as a function ofwavelength in semiconductor materials. Briefly explain why the absorption coefficient increaseswith increasing photon energy for energies near the bandgap.
1. A light source produces monochromatic light at 600 nm with a spectral irradiance of 1 x 10¹ photons/cm²/sec. What is the power density of this light source? Is the light source visible to the human eye? 2. The simplified band structure of silicon (n = 1 x 10¹0cm³) is shown below.
temperature nm inside a cavity of volume 100cm³ when the is 25 °C. Hint: make a rectangular approximation of the integral. 13. Demonstrate that the Planck distribution reduces to the Rayleigh- Jeans law at long wavelengths. ical coordinates. 14. Normalize the following wavefunction: rez in 3-D space using spher- 15 si muis illises
False A Si photo-detector has a length of L= 10 um and a hole lifetime of t, =1x 10° s. If a voltage of 5 V is applied across the detector length, the detector gain "G" at the applied voltage will be: %3D Select one: O A. Gph = 2.925 B. Gph = 25.000 C. Gph = 4.000 %3! D. Gph = 10.000 %3D E. Gph = 1.250
(b) Electrons in a diffraction experiment are accelerated through a potential difference of 200 V. What is the de Broglie wavelength of these electrons? (c) Explain in detail the wave-particle dual nature of light. Give examples Use quantum mechanics to support your discussion. SUNA 13
In the graph below the excitation (dashed line) and emission (solid line) spectra of a certain fluorescent dye is shown. To the nearest 5 nm, what is the peak emission wavelength of this dye? 3.80 430 480 Type your answer... 530 wavelength (nm) 580 -Excitation Emission 630
5) A metal with work function 9.05 eV is used for a photoelectric effect lab. Find the energy of the electrons if light with 200nm wavelength is used. 6) Energy levels for a particular system is given as En = 10.5 n(n+1)/n^3 in eV. Find the energy for electron transition from n=2 to n=4. Determine if this transition is an absorption that requires energy or it is an emission that releases photon.
Task 3: Quantum Theory h = 6.63 x 10-34 J • s; c = 3.00 × 108 m/s; m₂ = 9.11 × 10-³1 kg WAT potassium surface is illuminated by a monochromatic laser light with a wavelength of 400 termine the maximum speed of photoelectron mitted from this surface if the kg -31 potassim urfe Trs a work TU tion of 2.20 ev. me = 9.1 x 28 2.photon has a frequency 7.50 Hz, a Determine the energy momentum of this photon. . If the energyanis photon were to be converted to mass determine the equivalent mass for the particle, c. Amicroscopic specimen na wavelength of 6.2 x 107 m and speed of 1.1 10⁰ s Determine the mass of this microscopic specimen. 3. In a TV tube an electric potential difference accelerates electrons from a rest position towards a screen. Just before reaching the screen, the electrons have a wavelength of 1.2 x 10-11, m. Determine the kinetic energy of the electrons just before they reach the screen. Your final answer should have units of eV.
Wave Interference 22. A 2-slit experiment involves electrons that are accelerated with bias equal to 1,050 V, with a slit separation of 2 nm and slit-screen separation of 15 cm. (a) Calculate the kinetic energy of the electrons in units of eV. (b) Calculate the velocity of the electrons in m/s. (c) Calculate the wavelength of the electrons in nm. (d) Calculate the distance between the fringes in cm.