Gravitational Lensing

leave a comment »

In a long line of intellectual triumphs, Einstein’s theory of general relativity was his greatest and most imaginative.  It tells us that what we experience as gravity can be most accurately described as the bending of space itself.  This idea leads to consequences, including gravitational lensing, which is caused by light traveling in this curved space.  This is works in a way analogous to a lens (and hence the name).  In this video, Fermilab’s Dr. Don Lincoln explains a little general relativity, a little gravitational lensing, and tells us how this phenomenon allows us to map out the matter of the entire universe, including the otherwise-invisible dark matter.


Written by physicsgg

June 24, 2015 at 9:30 pm


Tagged with

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: