Wave Length from Kinetic Energy

The Wavelength from Kinetic Energy and Mass equation computes the wavelength based on the level of kinetic energy, mass and Plank's constant, where:

INSTRUCTION: Choose units and enter the following:

• (KE) Kinetic Energy
• (m) Mass
• (h) Planck's Constant

wavelength(λ): The calculator returns the wavelength in meters.  However, this can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The formula for wavelength from kinetic energy and mass is: 

`λ=h/sqrt(2mKE)`, 

where:

• lambda is the wavelength
• KE is the Kinetic Energy
• m is the mass
• h is Plank's constant

References

 35.1 Electrons as waves by Benjamin Crowell, Light and Matter  licensed under the Creative Commons Attribution-ShareAlike license.