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Chapter 38: Q. 2 (page 1114)

How many photoelectrons are ejected per second in the experiment represented by the graph of FIGURE EX38.2?

Short Answer

Expert verified

There are6250photo electrons are ejected per seconds.

Step by step solution

01

Given information

We have given, the graph between the current and the potential.

We have to find the photoelectrons ejected per second.

02

Simplify

the current is found out from the graph is

I=10μAi=10-5A

we know that the charge of one electron is 1.6×10-19C.

then the photoelectron per second is ejected is ,

n=Ien=10-151.6×10-19n=6250

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Most popular questions from this chapter

FIGURE Q38.9 is a simulation of the electrons detected behind two closely spaced slits. Each bright dot represents one electron. How will this pattern change if

a. The electron-beam intensity is increased?

b. The electron speed is reduced?

c. The electrons are replaced by neutrons?

d. The left slit is closed?

Your answers should consider the number of dots on the screen and the spacing, width, and positions of the fringes.

A ruby laser emits an intense pulse of light that lasts a mere 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of 500 mJ. a. How many photons are emitted in each pulse? b. What is the rate of photon emission, in photons per second, during the 10 ns that the laser is “on”?

I The allowed energies of a simple atom are 0.00eV,4.00eV,and6.00eV.

a. Draw the atom's energy-level diagram. Label each level with the energy and the quantum number.

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c. What wavelengths appear in the atom's absorption spectrum?

a. Calculate the de Broglie wavelength of the electron in the n=1,2,and3states of the hydrogen atom. Use the information in Table 38.2 .

b. Show numerically that the circumference of the orbit for each of these stationary states is exactly equal to n de Broglie wavelengths.

c. Sketch the de Broglie standing wave for then=3 orbit

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