For an indirect gap semiconductor such as silicon, the difference in wave vector between the VBM and the CBM is on the order of ?k = ?∕a, where a is the lattice constant of the material. (a) Explain why this is so. (b) Estimate ?k for Si, where the lattice constant is 0.543 nm. (c) For an optical transition to...
Calculate the energy flux for a gravitational wave of strength h= 10-21 if the frequency is 1000 Hz. If the wave from the previous problem is incident on the Earth what is the energy flux incident on the Earth? If they come from 20Mpc away at what rate was the source losing energy to gravitational waves when they were emitted?...
NL TS. magnetic field that pri hat points he force the proton feels? 6. If a proton is moving at a speed of 5 m/s to the right through a uniform me into the page direction), which of the following describes the force the proton The proton feels a force pushing it upward O The proton feels a force pushing...
Wave function
You are observing a wave traveling along the x-axis. The first picture (y vs. x) shows a snapshot of the wave at t=0. The second picture dy vs. t) shows how the wave height varies in time from the perspective of an observer standing at fixed location x-0. From this information, determine if the wave is traveling to...
10 -11 points My Notes Ark Your Two long, straight wires are oriented perpendicular to the computer screen, as shown in Figure 22-43, in which L 6.0 cm. The current in one wire is h = 2.2 A, pointing into the screen, and the current in the other wire is 12 = 4.0 A, pointing out of the screen +--…--由...
Part A Periodic Table Constants Two long thin parallel wires 13.0 cm apart carry 35 A currents in the same direction. Determine the magnitude of the magnetic field vector at a point 10.0 cm from one wire and 6.0 cm from the other (see the figure(Figure 1)). Express your answer using two significant figures. nνα ΑΣφ T Bi Request Answer...
could you write it clearly
euestions The Debye length, AD, is given by e n potential in a plasma. g the spatial variation of the electric 14 Calculate the temperature of a Tokamak plasma of density 3 x 1019 m3 that has a Debye 121 In a plasma entirely consisting of electrons and protons confined within an b) Length of...
Consider the long, straight, current-carrying wires shown in Figure 22-42. One wire carries a current of 2.4 A in the nega direction; the other wire carries a current of 4.5 A in the positive x direction. 16 cm B 16 cm 16 cm 16 cm 4.5 A Figure 22-42 (a) At which of the two points, A or B, do...
only answer part C in question 2
answer for a&b
a) 225988 nm^2/c
b) 22588 nm^2/c
2uC Fig. 8-14 2) A + 4uC point charge is placed in the center of a hemisphere of radius one 2) A The hemisphere is open', it has no enclosing left circular a) Find the electric flux through the hemisphere. b) Is this hemisphere...
(a) When an electromagnetic wave interacts with a material, what main three phenomena can occur? (b) Illustrate these three possible phenomena with a single drawing. (c) Provide a real world example of each with sunlight as the light source.