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Violet light of wavelength 400 nm ejects electrons with a maximum kinetic energy of 0.860 eV from sodium metal. What is the binding energy of electrons to sodium metal?

2.25 $\mathrm{eV}$

Physics 103

Chapter 29

Introduction to Quantum Physics

Quantum Physics

Cornell University

University of Michigan - Ann Arbor

Simon Fraser University

McMaster University

Lectures

02:51

Quantum mechanics (QM) is …

10:58

In physics, the photoelect…

01:15

What is the maximum kineti…

01:43

What is the binding energy…

01:23

The wavelength of the yell…

01:31

A 400-nm violet light ejec…

01:41

02:34

UV radiation having a 300-…

01:36

Calculate the binding ener…

02:43

Ultraviolet light with a w…

01:03

What is the wavelength of …

01:37

(a) The smallest amount of…

02:11

UV radiation having a wave…

01:38

The energy required to ion…

01:27

05:08

(II) What is the maximum k…

01:51

Light strikes a sodium sur…

01:14

The wavelength associated …

02:10

03:36

An X-ray photon of wavelen…

03:20

Light with a frequency of …

01:28

Sodium atoms emit light wi…

so in this problem. Uh, so we have the sodium atom, and we shut the light into this Adam and so that the electron comes out, We know that the wave list off the Motown lambda is 400 meters. And so that the energy of this photo is Ah e equal age times. See the robber Lambda. Okay, so, uh ah, this this the energy of the photo on equal the binding energy off the electron plants. The kind netiquette energy off this electron. So we from this problem we know that the kinetic energy of this electron is point 86 electro volts. OK, so we can figure out the fun energy. Ah kuo Ah! 2.25 electoral votes Good.

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