[blam]

"but how then do we resolve the notion that light travels in straight lines at a constant speed."

I thought that we had already decided that it didn't. Gravitational lensing?

[Old Professer]

I still won't believe in photons until I can hold one in my hand - the particle theory is probably just an observation of an unknown chemical reaction triggered by the unique wave-motion of light.

If we put a bag around the sun and collected all of the photons until the sun was burned out would the bag weigh as much as the sun when it was brand-new?