de Broglie Wavelength Of An Electron As Determinant Of Velocity Of An Electron
TECTechnics Classroom   TECTechnics Overview

Expressions Of Pj Problems
de Broglie Wavelength Of An Electron As Determinant Of Velocity Of An Electron

de Broglie Wavelength As Determinant Of Velocity Of An Electron

Assume the particle illustrated in Figure 22.13 is an electron moving with velocity v:
(a) How fast would the electron be moving in order to have a wavelength of 0.711 Å?
(b) Under certain conditions, the element molybdenum emits light with characteristic wavelength of 0.711 Å. What region of the electromagnetic spectrum do the emitted light belong?
(c) Name an important use for the light emitted by molybdenum.

The strings: S7P5A51 (Change - Physical Change)

The math:
Pj Problem of Interest is of type change (physical change). Velocity problems are change problems because it measures rate of change of distance with respect to time.

de Broglie Wavelength As Determinant Of Velocity Of An Electron

(a) The de Broglie equation that relates the wavelength of a particle with the velocity of a particle is:
λ = h/(mv) --------------(1)
Where λ is wavelength in meters; h is Plank's constant in Joules-sec; m is mass of particle in kilogram; v is velocity of particle in meter/sec.
So, from equation (1) we have:
v = h/(λm)
Plank's constant, h = 6.626 x 10-34 J-s = 6.626 x 10-34 kg-m2/s2;
Mass of electron = 9.109 x 10-28 g = 9.109 x 10-28 /103 kg.
Wavelength, λ = 0.711 Å = 0.711 x 10-10 m.
So, v = (6.626 x 10-34) /[(0.711 x 10-10) x (9.109 x 10-28 /103)
So, v = (6.626 x 10-34)/(6.476 x 10-41)
So, v = (6.626/6.476) x 10-34 x 1041
So, v = 1.02 x 107 m/sec.
So, speed of electron will be 1.02 x 107 m/sec, if it is to have a wavelength of 0.711 Å.

(b) If the conditions are appropriate, molybdenum emits X rays.

(c) X rays emitted by molybdenum are used in diffraction experiments to determine the structure of molecules.


The point . is a mathematical abstraction. It has negligible size and a great sense of position. Consequently, it is front and center in abstract existential reasoning.
Derivation Of The Area Of A Circle, A Sector Of A Circle And A Circular Ring
Derivation Of The Area Of A Trapezoid, A Rectangle And A Triangle
Derivation Of The Area Of An Ellipse
Derivation Of Volume Of A Cylinder
Derivation Of Volume Of A Sphere
Derivation Of Volume Of A Cone
Derivation Of Volume Of A Torus
Derivation Of Volume Of A Paraboloid
Volume Obtained By Revolving The Curve y = x2 About The X Axis
Single Variable Functions
Absolute Value Functions
Real Numbers
Vector Spaces
Equation Of The Ascent Path Of An Airplane
Calculating Capacity Of A Video Adapter Board Memory
Probability Density Functions
Boolean Algebra - Logic Functions
Ordinary Differential Equations (ODEs)
Infinite Sequences And Series
Introduction To Group Theory
Advanced Calculus - Partial Derivatives
Advanced Calculus - General Charateristics Of Partial Differential Equations
Advanced Calculus - Jacobians
Advanced Calculus - Solving PDEs By The Method Of Separation Of Variables
Advanced Calculus - Fourier Series
Advanced Calculus - Multiple Integrals
Production Schedule That Maximizes Profit Given Constraint Equation
Separation Of Variables As Solution Method For Homogeneous Heat Flow Equation
Newton And Fourier Cooling Laws Applied To Heat Flow Boundary Conditions
Fourier Series
Derivation Of Heat Equation For A One-Dimensional Heat Flow

The Universe is composed of matter and radiant energy. Matter is any kind of mass-energy that moves with velocities less than the velocity of light. Radiant energy is any kind of mass-energy that moves with the velocity of light.
Periodic Table
Composition And Structure Of Matter
How Matter Gets Composed
How Matter Gets Composed (2)
Molecular Structure Of Matter
Molecular Shapes: Bond Length, Bond Angle
Molecular Shapes: Valence Shell Electron Pair Repulsion
Molecular Shapes: Orbital Hybridization
Molecular Shapes: Sigma Bonds Pi Bonds
Molecular Shapes: Non ABn Molecules
Molecular Orbital Theory
More Pj Problem Strings

What is Time?
St Augustine On Time
Bergson On Time
Heidegger On Time
Kant On Time
Sagay On Time
What is Space?
Newton On Space
Space Governance
Imperfect Leaders
Essence Of Mathematics
Toolness Of Mathematics
The Number Line
The Windflower Saga
Who Am I?
Primordial Equilibrium
Primordial Care
Force Of Being

Blessed are they that have not seen, and yet have believed. John 20:29

TECTechnic Logo, Kimberlee J. Benart | © 2000-2021 | All rights reserved | Founder and Site Programmer, Peter O. Sagay.