Question about using imap with gnus

[Henry S. Greenside]

I am trying to get imap working with gnus v5.9.0 on a
Fedora Core 2 system and have run into a simple
problem: how do I tell gnus to read the email from the
imap server?

I have the following in my .gnus file:

   (setq gnus-secondary-select-methods 
   '(
      (nnimap "physics"
        (nnimap-address "mail.phy.duke.edu")
        (nnimap-port 993)
        (nnimap-list-pattern "~/Mail/*")
      )))

but can't figure out from the GNUS documentation what
group to join to get the mail.

    Thanks,

    Henry