E = mcE = mc22

Yeah So What?Yeah So What?

Outstanding Science Issues in 1900Outstanding Science Issues in 1900

This is an Original IdeaThis is an Original Idea

Requires the speed of light to be finiteRequires the speed of light to be finite Light has an energy related mass and is Light has an energy related mass and is

effected by gravityeffected by gravity Mass can be converted to Energy Mass can be converted to Energy now now

we know how stars shinewe know how stars shine Gravity = curvature of space-time; Mercury Gravity = curvature of space-time; Mercury

orbits in curved space due to proximity to orbits in curved space due to proximity to the Sunthe Sun

Light can’t escape the Light can’t escape the Universe

This Idea Seems LudicrousThis Idea Seems Ludicrous

In a letter to a friend, Einstein writes:In a letter to a friend, Einstein writes:

" ...The relativity principle in connection with the " ...The relativity principle in connection with the Maxwell equations demands that the mass is a Maxwell equations demands that the mass is a direct measure for the energy contained in direct measure for the energy contained in bodies; light transfers mass... This thought is bodies; light transfers mass... This thought is amusing and infectious, but I cannot possibly amusing and infectious, but I cannot possibly know whether the good Lord does not laugh at know whether the good Lord does not laugh at it and has led me up the garden path."it and has led me up the garden path."