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
JH
Related Physics A Level answers
All answers ▸Calculate the frequency of a simple pendulum of length 950 mm. Give answer to an appropriate number of significant figures.
Why do atoms larger than iron release energy when they undergo fission?
Describe energy transformations in a oscillating pendulum, which undergoes simple harmonic motion. How this implies the velocity at critical (lowest and highest) points?
State Newton's Law of Gravitation