Can someone explain the physical architecture of RAID 10 in complete layman's terms?

I am a newbie in the world of storage and I am having a
hard time digesting the physical architecture of some of the RAID levels. I am
particularly interested in RAID 10, and 50. I asked the question specifically about RAID
10, because I feel if I understand that, I'll understand the
other.

So, I get the definition of RAID 10 -
"minimum 4 disks, a striped array whose segments are mirrored". If I've got 4 disks and
Disks 1 and 2 are a mirrored pair, and Disks 3 and 4 are a mirrored pair - where does
the data get
striped?

Thanks.

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