How can I determine what the default font it?

[exits funnel]

Hello,

I've just upgraded to emacs 21.3.1 from emacs 19.7(?)
running on RedHat Linux.  It works great but for one
immediate problem.  The default font size is much
smaller and I can barely read it.  I've done a bit of
research (I'm pretty new to Linux and well as emacs)
on changing the font size but I have a few quick
questions.  First of all it seems I can do this either
by modifying my .emacs file or by modifying
.Xdefaults.  Which approach is better?  I'm assuming
if I change .Xdefaults this will affect other programs
besides emacs.  My other question is how can I find
out what font emacs is currently displaying?  Thanks
in advance for any replies.

-exits  

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