A semiconductor has an energy gap Eg. Explain what happens when the semiconductor is bombarded with electromagnetic radiation with wavelength λ< hc/Eg . Repeat for λ>hc/Eg

Q: Under what conditions is twinning favored in BCC and/or FCC crystals?

A:

Q: Two particles are created in a high-energy accelerator and move off in opposite directions. The spee...

A: The speed of the second particle with respect to the laboratory frame is, vx=vx'+u1+uvx'c2   Note: t...

Q: Consider two conducting plates of infinite extent, one plate at z = 0 and the other at z= L , both p...

A: Solution:   Introduction:   It is to introduce the condition of the standing wave in the empty regio...

Q: A researcher has placed a sample of radioactive material in an enclosure and blocked all emissions e...

A: The expression for the magnetic force is as follows: F→=qv→×B→               1

Q: Young domestic chickens have the ability to orient themselves in the earth’s magnetic field. Researc...

A: Given: Turns in both coils n = 43. Radius of both the coils r = 1 m. Magnitude of Earth’s field B =...

Q: Who would be best qualified to consult on a case requiring forensic entomology?

A: Forensic entomology is the study of insects as they pertain to criminal investigations. It requires ...

Q: Ch.5 Problem 20

A:

Q: Singly ionized helium has a single orbiting electron, so the mathematicsof the Bohr hydrogen atom wi...

A: Given value, The longest wavelength in hydrogen Balmer series correspond to n=3 to n=2. Energy level...

Q: Calculate the force and moment reactions at the bolted base O of the overhead traffice-signal assemb...

A:  

Q: 8.5 Calculate the grand partition function for a system of N noninteracting quantum mechanical harmo...

A: The expression of energy for the harmonic oscillator be given as, E=∑iPi22m+12mω02qi2

Q: An object of mass 0.35kg oscillates in Simple Harmonic Motion with an amplitude of 140mm and a frequ...

A: (a) The expression for the kinetic energy is, K=12mω2A2-x2 At x=0, kinetic energy is maximum that is...

Q: An astronaut travels to a star system 4.5 ly away at a speed of 0.90c. Assume that the time needed t...

A:

Q: 4-12. Consider a system of N distinguishable independent particles, each of which can be in the stat...

A: There are N distinguishable independent particles and the energy levels have the energies of +ε0 and...

Q: 4. Which requires the larger relaxation allowance: a noise level of 100 dB with 5 hours of exposure,...

A: Introduction: The relaxation phenomenon is an effect related to the delay between the application of...

Q: When a nucleus of 240Pu undergoes fission, it breaks into two smaller, more tightly bound fragments....

A: (a) 240Pu94Z = 94A = 240Number of neutrons = 240-94= 146Mass of neutron = 1.0083 uMass of proton = 1...

Q: Obtain the expression for the generalized momentum for the relativistic particle when the Lagrangian...

A: Lagrangian is given as, L=-mc2Υ-Uwhere Υ=11-v2c2=11-x.2c2

Q: a) Find the capacitance of the capacitor. b) Find the charge stored on the plates of the capacitor i...

A: The capacitance of the parallel plate capacitor is given by Where k = dielectric constant, A = Area...

Q: A uniform line charge density of 5 nC/m is at y = 0, Z = 2m in frees pace, while -5 nC/m is located ...

A: We know, for a line charge density  E=λ2πε0d where, λ is the line charge density d is the distance o...

Q: This one is a two part question and both the parts are attached as image.  The first question is ref...

A: Hi. Since you have posted multiple questions and not specified which question you want us to solve, ...

Q: Advanced Physics Question

A: This question was answered . Here the disc should be inverted  to uderstand it as shown             ...

Q: A 3700-pF air-gap capacitor is connected to a 30-V battery. Part A If a piece of mica (K = 7) is pla...

A: The expression for the charge in the capacitor is as follows: Q1=CVQ1=3700 pF×10-12F1 pF30 VQ1=1.11×...

Q: A boxer punches a 50-kg bag. Just as his fist hits the bag, it travels at a speed of 7 m/sec. As a r...

A: Given: Weight of the bag m = 50 kg. Initial speed of the fist vhi = 7 m/s. Initial speed of the bag...

Q: The beta-emitter nuclide Pm-147 can serve as a radionuclide power source. How much thermal power in ...

A: Given: Given mass of the element m = 500 g.

Q: A dipole of moment p1 lies at the origin and a dipole of p2 lies at a point whose position vector is...

A: Two dipole are to be arranged in such a way that their forces etween them maximum .              Ele...

Q: In my inertial frame of reference S, event A occurs before event B. I measure these events to be sep...

A: This problem can be solved with the concept of causality.

Q: Two blocks connected by a rope of negligible mass are being dragged by a horizontal force (see figur...

A:

Q: Please do D, E, and F

A: (d) Given: The number of electrons that have been shot is 10000. Introduction: The Stern–Gerlach exp...

Q: The value of p,H|(the square bracket represents the Poisson Brackets, p is the density of states, an...

A: Given, ρ=density of statesH=Hamiltonian

Q: Give answer only optional

A: Answer:   Diamond structure: It is an interpenetration of two FCC(Face centered cube) Lattices. Out ...

Q: A student of mass 61.4 kg, starting at rest, slides down a slide 19.2 m long, tilted at an angle of ...

A: (a) Frictional force is, f=μN Here, f is the frictional force,  is the coefficient of friction, N is...

Q: (a) energy per cycle is delivered as heat to the room and (b) work per cycle is required to run the ...

A: (a) The coefficient of performance is as follows: COP=QhQh-QcCOP=ThTh-Tc                    1

Q: A positive unit charge is at a distance of 200 pm from a molecule of hydrochloric acid. Find the cor...

A: The expression for the potential energy of the system is as follows: U=-kepqr2U=-9×109N·m2/C21.3 Deb...

Q: An electron with a kinetic energy of 3.90 eV collides with a sodium atom. What possible wavelengths ...

A: Given: The kinetic energy of the electron is 3.90 eV. The collision is with sodium atom. Introductio...

Q: In frame S, a particle of mass M travels along the x-axis with velocity v. Itdecays into two photons...

A: Let the rest frame of particle of mass M be S'. S' is moving be moving at velocity v along x axis wi...

Q: The potential energy function for either one of the two atoms in a diatomic molecule is often approx...

A: Given U(x)=-ax12-bx6 Here, U(x) is the potential energy function and x is the separation between the...

Q: Hi  I need help with following attachment questions.  Thanks

A:   Note: Please note that we are allowed to answer only first part kindly post remaining questions se...

Q: Why do transmission lines operate at very high voltages while household circuits operate at fairly s...

A: The power loss through the line is given by, P=I2R thus, the power loss is depends on the square of ...

Q: A feather falls at constant velocity a vertical distance of 123.8 m. If the mass of the feather is 3...

A: Given: Mass of the feather ,m=39.04g velocity is constant Distance =d=123.8m The work done by gravit...

Q: 5) The B has a component B, = - 2.10 meter and B, = -1.70 meter Find angle 6. Draw the diagram and s...

A: Given Bx= -2.1 m By= -1.7 m

Q: Physics word problem on energy/work/force:

A: As per guidelines, the first three sub-parts have been answered. (a) Potential energy of mass m is, ...

Q: A plane-polarized electromagnetic wave of frequency w in free space is incident nor- mally on the fl...

A: Given: Frequency of plane polarized electromagnetic wave in free space is ω. Conductivity of non-per...

Q: The golden earring A disk of radius r is removed from a larger disk of radius R to form an earring (...

A:

Q: A point charge Q=2000pc, is at the origin of spherical coordinates. A concentric spherical distribut...

A:

Q: The position vector of a cat running on a field is given by: r(t) 312 – 4t + 2 y(t) 6t2 – 5t where x...

A: The position of the particle at time t is given by Where  and  are unit vectors along + x-axis and ...