Re: photon rest mass

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From: Cbdirtball@aol.com
Date: Sat Apr 24 2004 - 13:52:02 PDT 

From: Cbdirtball@aol.com
Message-ID: <22.45e46617.2dbc2d72@aol.com>
Date: Sat, 24 Apr 2004 16:52:02 EDT
Subject: Re: photon rest mass

I had a student ask a couple of questions in physics this week. We use the
Hewitt text which is great. However, the discussion is just deep enough in the
book to raise more questions to curious students.

Thanks,

Charlie Bissell
Hillsdale High School
San Mateo Union HS District

1) How is it that photons have no rest mass? Has this lack of rest mass been
measured?
2) What determines which direction a photon will travel after it's been
emitted from an electron? Like, what makes the surface reflect (send the photon
back in the direction it came from) or be transparent (send it in the direction
of travel)?

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