Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

$\cdot$ A clean nickel surface is exposed to light of wavelength 235 $\mathrm{nm} .$ What is the maximum speed of the photoelectrons emitted from this surface? Use Table $28.1 .$

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

$2.5 \times 10^{5} \mathrm{m} / \mathrm{s}$

Physics 102 Electricity and Magnetism

Physics 103

Chapter 28

Photons, Electrons, and Atoms

Electromagnetic Waves

Atomic Physics

Rutgers, The State University of New Jersey

Simon Fraser University

University of Sheffield

University of Winnipeg

Lectures

02:42

Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. It is primarily concerned with the arrangement of electrons around the nucleus and the processes by which these arrangements change. The theory of quantum mechanics, a set of mathematical rules that describe the behaviour of matter and its interactions, provides a good model for the description of atomic structure and properties.

03:50

In atomic physics, the Rutherford-Bohr model or Bohr model or Bohr model of the atom was first proposed by Niels Bohr in 1913. It was the first quantum theory of the atomic structure, applying the principles of quantum mechanics to the hydrogen atom. The Rutherford-Bohr model is a planetary model in which the electron is assumed to revolve around the nucleus in circular orbits. The Rutherford-Bohr model of the atom was based on Max Planck's quantum theory of radiation, which explained the spectrum of blackbody radiation, and Albert Einstein's theory of the photoelectric effect, which explained the origin of the spectrum of line emission from atoms. The Bohr model of the atom was the first to explain the discrete spectrum of hydrogen and how the spectral lines of the hydrogen atom were split into multiple spectral lines in a phenomenon called the fine structure. It introduced the Bohr radius and the concept of quantum levels to explain the discrete nature of the spectrum of the hydrogen atom. The Bohr model of the atom had a significant influence on the development of quantum mechanics, and was instrumental in the development and validation of quantum mechanics.

04:40

A clean nickel surface is …

05:57

00:54

02:09

02:03

05:31

With what speed will the f…

01:48

What potential difference …

01:52

The work function of a pho…

09:15

When ultraviolet light wit…

04:33

01:10

The cutoff wavelength for …

All right. So in this problem, the energy of the photons impinge ng on the nickel surface has given by e equals h f the Einstein relation and eh thin land are related through C equals lambda F. So in this equation, we can replace F with C over lambda, and we get this new expression. So we want the energy in electron volts will express each in electron volts as well times the speed of late and divided by our wavelength, which in this case is 235 nano meters. And this comes out to five point to a TV and we can look up that the work function for nickel is 5.1 TV. So basically, the photons in part five point to a TV into the nickel surface, and then the electrons lose 5.1 TV as they emerge. And so they're kinetic. Energy is given by the difference of these two, and we're gonna multiply by 1.6 times 10 to the negative 19 to convert to Jules. Um, lastly, it's just a matter of solving for Ruthie, So we multiply by two and we need to divide by the electron mass, which is 9.11 times 10 to the negative 31. And this comes out to 2.5 times 10 to the five meters per second. Thank you.

View More Answers From This Book

Find Another Textbook

02:01

Read the scenario.A bag filled with 10 g of ice is left out in the sun, …

02:22

pressure acting on the piston x of a U tube is 2400 N/m2what is the pressure…

02:07

21. On beating a carpet with a stick, the dust particles fall off. Explain w…

02:04

The normal atmospheric pressure is 76 cm of mercury. Calculate this pressure…