Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Electron Speed
Name: N/A
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: N/A


Question:
DOES THE ELECTRON TRAVEL AT THE SPEED OF LIGHT?



Replies:
No. If you calculate the instantaneous speed of electron using the theoretical models, it comes out to be the velocity of light. However, we cannot measure instantaneous speeds, but only speed averaged over some time scale by measuring position at two instants of time. When we do this, the speed is always less than the velocity of light. Theoretical models also predict average velocity less than speed of light. The above discussion only applies to speed of light in vacuum. Electrons can , and do, travel at speeds faster than speed of light in some media.

Jasjeet



Click here to return to the Physics Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory