🚀 go-pugleaf

Since some people asked, it's better to make clear that the real issue in this
problem is the context of the statement "the speed of light is a constant,"
not whether light's speed changes when hitting a mirror.  Einstein's 
postulate is that the speed of light is constant whether we observe it in a
"still" laboratory or in one that is moving at a constant speed relative to the 
light source.  A mirror is out of the picture.
Yuan Liu

Yuan LIU (yliu@calvin.stemnet.nf.ca) wrote:
: Nice thinking.  But if you look closely at the statement, it says that the
: "speed" of light, not the velocity of light, is a constant.  And, unlike a
: particle, a wave doesn't stop to change direction.

: Yuan Liu
: http://www.stemnet.nf.ca/yliu/acoustics.html

: Robert Kaufman (robert.kaufman@sympatico.ca) wrote:
: : If the speed of light is constant what happens when you look in a mirror? 
: : Doesn't the light have to STOP when it hits the mirror before it changes
: : direction and fis reflected back to you?