Understanding the Difference Between Pixel and Photodiode: Expert Help

[bonefish]

Pixel + Photodiode!help

Hi!
I don't know if this is the right place for this topic but I could not find "Digital Technology" elsewhere so here I go:

I'm having trouble figuring out the difference between a pixel and a photodiode as well as a capacitor- they all seem like the same property to me!

Can someone please help me?

Thanx

 

[Redbelly98]

This is being discussed here:
https://www.physicsforums.com/showthread.php?t=283402&highlight=pixel+capacitor

In the interest of keeping the discussion together in one place, please post there. Thanks!