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 Light Traveling Through Dark
Name: Amber
Status: student
Age: N/A
Location: N/A
Country: N/A
Date: N/A


Question:
How does light travel through dark?



Replies:
We can see light waves only if they travel directly at us and get in our eyes. Usually, light must hit something solid and "light it up" (be reflected into our eyes) before we can be sure any light is there. We don't see light go through the dark, because there is nothing for it light up yet. None of the light is heading towards us and entering our eyes. Sometimes there is dust in the air it reflects enough light into our eyes for us to see a "light beam".

Actually, it is pretty lucky we cannot see light as it goes by. If we could see all the light waves flying around, the whole room would look very bright. And, like when someone shines a flashlight in our eyes, we could never see well enough to get around!

R. Avakian



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