### Discuss concept of group velocity with the aid of an example

Assignment Help Physics
##### Reference no: EM131013765

1. Discuss the phenomenon of dispersion.

2. Discuss the concept of group velocity with the aid of an example.

3. What is a dispersion diagram? Explain how the phase and group velocities can be determined from a dispersion diagram.

4. When is it meaningful to attribute a group velocity to a signal comprised of more than two frequencies? Why?

5. Discuss the propagation of a narrow-band amplitude modulated signal in a dispersive channel.

### Previous Q& A

#### Construct a price-weighted index

You construct a price-weighted index of 55 stocks. At the beginning of the day the index is 8,710.44. During the day, 54 stock prices remain the same, and one stock price increases \$5.40. At the end of the day, your index value is 8,757.89. What is t..

#### Assume interest payments are paid semi-annual

Compute the price of a 5.6% coupon bond with 18 years left to maturity and a market interest rate of 5.9%. (Assume interest payments are paid semi-annual and the face value is \$1000.) Is this a discount or premium bond?

#### What is the initial margin ratio

Read the requirements for each problem and plan your responses carefully. Although your responses should be concise, ensure that you answer each of the required components as completely as possible. If supporting calculations are required, present th..

#### Narrator characters in breakfast of champions

The universe of the narrator's characters in Breakfast of Champions is apparently his attempt at writing about life; the universe which includes the narrator himself as a character can be seen as Vonnegut's attempt at the same

#### What is your estimate of the stocks current value

Sawchuck Consulting has been profitable for the last 5 years, but it has never paid a dividend. Management has indicated that it plans to pay a \$0.25 dividend 3 years from today, then to increase it at a relatively rapid rate for 2 years, and then to..

#### Which the revenues and expenses are reported

What is the reason for the apparent inconsistency between the fund types in which the revenues and expenses are reported?

#### Is cutoff wavelength dependent on dielectric in waveguide

Is the cutoff wavelength dependent on the dielectric in the waveguide? Is the cutoff fre- quency dependent on the dielectric in the waveguide? What is guide wavelength?

#### About the growing annuity payments

You want to accumulate \$3 millions by your retirement date, which is 25 years from now. You will make 25 deposits in your bank, with the first occurring today. The bank pays 7.82% interest, compounded annually. How much must your first deposit be to ..

#### Drive an equation of the tangent plane to the surface

Find an equation of the tangent plane to the surface z = ex^2-y^2, at the point(1, -1, 1). Determine whether the function is a solution of Laplaces equation uxx uyy =0.  u= ln(x2 - y2) + 2 tan-l(y/x).

#### Media is considering some new equipment whose data

Thomson Media is considering some new equipment whose data are shown below. The equipment would be depreciated over a 3 year MACRS life, but it would have a salvage value at the end of Year 3, when the project would be closed down.

### Similar Q& A

#### The electric field strength in air exceeds

If the electric field strength in air exceeds 3.0*106 N/C, the air becomes a conductor. Using this fact, decide the maximum amount of charge that can be carried by a metal sphere 2.4 m in radius.

#### A rod length 20m is uniformly charged and has a total

a rod length 2.0m is uniformly charged and has a total charge of 5.0 nc. what is the electric potential at a point

#### Find the original speed of the cue ball

Find the angle between the cue ball's original direction of motion and the second ball's direction of motion after the collision. Find the original speed of the cue ball.

#### Find the maximum kinetic energy of the photoelectrons

When ultraviolet light with a wavelength of 400.0 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV. What is the maximum kinetic energy of the photoelectrons

#### A golfer hits a shot to a green that is elevated 280 m

a golfer hits a shot to a green that is elevated 2.80 m above the point where the ball is struck. the ball leaves the

#### Gravitational force on the package

For the 20.0 cm displacement, what is the net work done on the package by the three applied forces, the gravitational force on the package, and the normal force on the package?

#### What is the difference between these wavelengths

Visible light passes through a diffraction grating that has 900 slits per centimeter, What is the difference between these wavelengths

#### Find the speed at which protons exit the cyclotron

A cyclotron (see figure below) designed to accelerate protons has an outer radius of 0.333 m. Find the speed at which protons exit the cyclotron

#### Change in the kinetic energy of the merry-go-round

A 38-kg boy running at 3.7m/s jumps tangentially onto a small circular merry-go-round of radius 2.0 m and rotational inertia 20 kg? m2 pivoting on a frictionless bearing on its central shaft. Merry-go-round initially rotating at 0.70rad/s opposite th..

#### Determine the acceleration due to gravity

An astronaut constructs a pendulum with a length of 1 meter on a new planet. If the period is 3 second, what is the acceleration due to gravity

#### Obtain what percentage of the molecules has escaped

Air in a cylinder is compressed to one-tenth of its actual volume without change in temperature. Obtain what percentage of the molecules has escaped

#### Estimate the wavelength of the incident light

The second-order dark fringe in a single-slit diffraction pattern is 1.40 mm from the center of the central maximum. Calculate the wavelength of the incident light 