Recent content by codjohns

Unless you are standing perpendicular to the plane of entry and the light enters the plane at a 90 degree angle no. For example, If your on Earth and the sun cast no shadow (90 degrees with you) then it is where it appears to be. If you stand directly over a fish in a pond it is where it seems...

That is why the sky is blue, same with a prism, all matter that light travels through even gas will distort the direction of the light until it exits. Away from the normal.

I am wondering about photons having mass. The new thing on all the space shows is the sailing through space with a sail that harnesses photons as a ship harnesses wind. They did an experiment and the photons exerted a force on the sail. Am I wrong to think that E=mc^2 (E can not be 0 so M can...