Can my Intel iMac read double-layer DVDs?

What are double-layer DVDs as opposed to regular ones, anyways?
A friend wants to send me several DVDs worth of files on "double-layer DVDs". Can I read them?
I have a Intel iMac (dual processor) with a MATSHITA DVD-R UJ-846 CD/DVD Drive.
I don't want my friend to go through this and then I can't read them. Especially since he makes it out like double-layer DVDs are maybe new or advanced?
Huh? Anyone?

Can my Intel iMac read double-layer DVDs?
Yes.
What are double-layer DVDs as opposed to regular ones, anyways?
These DVDs contain a second writable layer, which doubles the DVD's capacity.
(32795)

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