Light striking a metal plate can eject electrons

Assignment Help Physics

Reference no: EM13675318

Light striking a metal plate can eject electrons from the plate's surface (this is called the photoelectric effect). Imagine that we place the plate in a vacuum and set up an electric field in the plate's vicinity that is uniform in magnitude and direction such that the electric field vector E at any point near the plate has a magnitude of 1000 N/C and points directly away from the plate, perpendicular to its surface. Electrons ejected with the photoelectric effect will have initial kinetic energies of no more than about 3 eV, where 1 eV = 1.6 x 10^-19 J. Roughly estimate the maximum distance that an ejected electron can obtain from the plate under these circumstances. (Hint: Consider an analogy to the behaviour of a thrown ball in a uniform gravitational field.)

Reference no: EM13675318

Questions Cloud

Initial velocity and the constant acceleration of green car : A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to and x axis. At time t=0, the green car is at xg=224 m and the red car is at xr=0. If the red car has a constant velocity of 21km/h, th..

Initial kinetic energy of electron in electron volts : An electron with an initial speed of 660,000 m/s is brought to rest by an electric field. What was the potential dissimilarity that stopped the electron? What was the initial kinetic energy of the electron, in electron volts?

What is the electric flux during the circle-field lines : A flat circle of radius 19cm is placed in a uniform electric field of magnitude 5.8×102N/C. What is the electric flux during the circle when its face is perpendicular to the field lines? What is the electric flux during the circle when its face is at..

What is the area of the leaf : Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold by a mass of 3.245 g, is pressed into a leaf of 3.989 m thickness, what is the area of the..

Light striking a metal plate can eject electrons : Light striking a metal plate can eject electrons from the plate's surface (this is called the photoelectric effect). Imagine that we place the plate in a vacuum and set up an electric field in the plate's vicinity that is uniform in magnitude and dir..

Depends on magnitude of charge q utilized to probe field : Points in the same direction as the electric force if the probe charge q is positive and the opposite direction of the electric force if the probe charge q is negative. Depends on the magnitude of the charge q utilized to probe the field.

Polarizability of a carbon atom : Try rubbing a plastic pen through your hair, and you'll discover that you can pick up a tiny scrap of paper when the pen is about one centimetre above the paper. From this simple experiment you can estimate how much an atom in the paper is polarized ..

Average speed at which water enters hose at pump on truck : What is the average speed at which water enters the hose at the pump on a fire truck? Water travels at an average speed of 4.00 m/s during the nozzle when nozzle is 15.0m above fire truck.

Compute its volume and uncertainty in cubic centimetres : The sides of a small rectangular box are gauged to be 1.70 ± 0.02 cm, 2.10 ± 0.05 cm, and 3.3 ± 0.2 cm long. Compute its volume and uncertainty in cubic centimetres.

User Account

All Pages