What is the de Broglie wavelength of a dust particle that has a mass of 1e-10 kg and a velocity of 0.05m/s?

From the question asked, we need to identify the key bits of information.

Firstly, we are asked to find the de Broglie wavelength, so we write down the de Broglie relation:

lambda = h/p

In this equation we want to find the wavelength lambda, and we know h is Planck's constant, h = 6.63e-34 Js. So the remaining term we need to determine is p, the momentum.

In order to find the momentum, we use the relation p=m*v, using the mass and velocity given in the question.

We can now calculate the wavelength by plugging p into the de Broglie formula.

lambda = 1.33e-22 m

Answered by Josh H. Physics tutor

6978 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Explain how Maxima and Minima occur in Young's double slit experiment


A positively charged particle enters a magnetic field oriented perpendicular to its direction of motion. Does the particle: A) Change its velocity, B) Change its speed, C) Accelerate in the direction of the magnetic field.


How, given the threshold frequency and the kinectic enery of a photon, do you determine the frequency of the phton?


What is the total energy of a spaceship of mass m, orbiting a planet of mass M in a circular orbit with radius r? The ship and the planet are taken to be an isolated system.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy