Problem_Set_5_2009-1

Problem_Set_5_2009-1 - 22:01 Introduction to Ionizing...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
22:01 Introduction to Ionizing Radiation Problem Set 5 Date Due: Tuesday 27 October 2009 1. Light of intensity 1.0 x 10 -10 W/m 2 falls normally upon a silver surface that has one free electron per atom. The atoms are approximately 2.6 Å apart. Treat the incident radiation classically (as waves); assume the energy to be uniformly distributed over the surface; and assume all the light to be absorbed by the surface electrons. (a) How much energy does each free electron gain per second? (b) The binding energy of an electron at a surface is 4.7 eV. How long must one wait after the beam is switched on before any one electron gains enough energy to overcome its binding energy and be released as a photoelectron? Compare this with the experimental results. 2. One method of determining the wavelength of a monochromatic beam of x-rays is by measuring the maximum kinetic energy of the recoil electrons. If a monochromatic x-ray beam strikes a metal target and the maximum kinetic energy of the recoil electrons is 425
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Problem_Set_5_2009-1 - 22:01 Introduction to Ionizing...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online