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- The photoelectric effect is when light knocks electrons off the surface of a material. If you're shinning light on a surface and electrons are being knocked off, what could you change about the light so that it would stop knocking electron off? O Reduce the frequency of the light. O Increase the amplitude/intensity of the light. O Increase the frequency of the light. O Reduce thc wavelength of the light.Magnetic field of a plane wave in a lossless, 4, = 2 medium is given: Ħ(x, y; t) = ē,2 sin ((3x + 4y – 310°t)[A/m] a. Find the amplitude, frequency, wavelength, propagation direction. b. Find dielectric constant of medium and the phase velocity. c. Find the E field. d. Write E field in phasor domain. е. Write H field in phasor domain.If you wish to observe features that are around the size of atoms, say 5.5 × 10-10 m, with electromagnetic radiation, the radiation must have a wavelength of about the size of the atom itself. a. If you had a microscope which was capable of doing this, what would the frequency of electromagnetic radiation be, in hertz, that you would have to use? f = b. What type of electromagnetic radiation would this be?
- What is the wavelength at which the Cosmic Background Radiation has highest intensity (per unit wavelength)? A. 1 μm B. 1 mm C. 1 cm D. 1 m Is the answer B? Thanks!What is the type of emission for a crystal transmits an E.M wave with 1GHz at room temperature?Q1. Solve the following, Assuming the spherical D- layer has a refractive index of 0.75, and the frequency of transmitted signal is 50MHZ, at an angle of incidence t/3 radians. A. Calculate the Electron density B. Find the critical frequency, C. Find Maximum usable frequency, if Nmax = 2x Ncritical
- The message signal m(t) = 10 sinc(2001) frequency modulates the carrier c(1) = 200cos 27 fel. The modulation index is 7. 1. Write an expression for the modulated signal u(t)? 2. What is the maximum frequency deviation of the modulated signal? 3. What is the power content of the modulated signal? 4. Find the bandwidth of the modulated signal.A signal from of PLDT-Fibr travels through its optic cable at the speed of (2x108 m/s).a.) How long will it take for the signal to travel from our house to LJ’s house which has a30.35 km distance b.) What length in inches of the optic cable represents 0.75 ms(millisecond)?-co "O... 4. A 20.0-mW (milli-Watts) laser puts out a narrow cylindrical beam 1.60 mm in diameter. What is the average rms B- field? T
