The photoelectric effect can be used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength of IR light. If the energy needed for signal generation is 7.7 x 10-20 J, what is the minimum wavelength? What is the frequency of light that can be detected? c = 2.998 x 10 m/s !! h = 6.626 x 10-34 Js %3D m

The photoelectric effect can be used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength of IR light. If the energy needed for signal generation is 7.7 x 10-20 J, what is the minimum wavelength? What is the frequency of light that can be detected? c = 2.998 x 10 m/s !! h = 6.626 x 10-34 Js %3D m

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

In an aircraft, to protect a PCB from external interference signals it is housed in an Aluminum(Al) Box (this is normally referred to as shielding). Conductivity of Al is 38.2 x 106 S/m & µr = 1. What shall be the minimum thickness of the Al sheet from which this box is made, if we have to block 1.6 MHz interference signal from passing through this sheet?
A photon carries 2.56 eV of energy. What is the photon's frequency? (h= 6.626 x 10-34 J-s; 1 eV = 1.60 x 10-19 J)
The dispersion curve of glass is the curve that describes how the index of refraction of glass changes as a function of the wavelength. This curve can be represented approximately by Cauchy's empirical equation, n = A + B/2² where for a specific glass in question A = 1.40 and B = 2.5 × 10 nm² (yes, those units are nanometer squared). Find the phase and group velocities for light of 500nm wavelength in that glass.
How much energy (in eV) does a photon of red light (1 = 700 nm) have? (h=6.63 1034 Jxs, c=3.00 10³ m/s, 1 eV = 1.60 10-19 J, and 1 nm = 109 m) -9 3.11 eV 2.26 eV 1.78 eV 1.24 eV..!
An isotropie point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is positioned 200 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? 3.44x10*6 tesla/s 2.0x10*6 tesla/s 3.44x10*6 gauss/s 6.88x10*6 gauss/s 1.72x10*6 tesla/s 2.0x10 6 gauss/s 6.88x10*6 tesla/s 5.0x10*6 tesla/s 5.0x10 6 gauss/s 1.72x10^6 gauss/s O None of them
h) The difference in arrival time between wave-packets with centre frequencies of ω1 and ω2 is Δt. What is DM in terms of Δt ?
A CO, laser produces a cylindrical beam of light with a diameter of 0.850 cm. The energy is pulsed, lasting for 1.70 ns, and each burst contains an energy of 400 mJ. What is the length L of each pulse of laser light? L = m What is the average energy per unit volume uve for each pulse? J/m
The temperature of an object is 310 K. The electromagnetic radiation emitted by this object is: O in the ultraviolet region of the spectrum. O in the microwave region of the spectrum. O in the visible region of the spectrum (red). O in the visible region of the spectrum (yellow). O in the visible region of the spectrum (violet).. O in the infrared region of the spectrum.
4. An elliptically-polarized plane wave propagating along the z-axis scatters from an electron. The E-field of the wave is given by Ē = Eo [cos 0 cos(kz - wt) + sin 0 sin(kz - wt)ŷ], where 0 ≤ 0 ≤ π/2. a. Neglect the magnetic force-ev× B. Characterize the radiation scattered by the electron by determining the frequency and the polarization along the x-, y, and z-axis. Find a direction along which the radiation is circularly polarized. b. Calculate the total scattered power, averaged over a cycle, and discuss its dependence on 0. c. Calculate the B-field and evaluate the ev× B term. Discuss the direction and frequency of the magnetic force and its dependence on 0. d. Discuss how the scattering of the incident wave is modified by the magnetic force by specifying which new frequencies are observed, in which direction and with which polarization, and the modification of the scattered power.
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.
The chlorophyll in green leaves has its absorption maximum at a wavelength of 680 nm. Assume that the concentration of chlorophyll in leaves is 1.04*10-3 mol/L and that the absorption cross section, o(A=680 nm), of chlorophyll is 3.79*10-16 cm?/molecule. Determine the relative intensity of light at 680 nm that travels through a leaf of 0.0200 cm thickness. Give your answer in %.
Light with an intensity of 10−10W/m2 is shone perpendicular to the surface a metal that has one free electron per atom. Distance between atoms approx 2, 6A˚. Based on the notion of light as a wave and the assumption that light evenly distributed over the entire metal surface, (a) how much energy each electrons per second? (b) if the electron binding energy is 4.7eV , how long does the electron collect energy to escape the metal surface?