Is a piece of toast in a toaster conduction or convection or radiation?

Oh, dude, that's a great question! So, when you pop that bread in the toaster, it's actually getting toasted through radiation. Yeah, like the heat waves are hitting the bread and making it all crispy and delicious. So, next time you're making toast, just remember you're basically using a mini radiation machine in your kitchen. Enjoy your radioactive breakfast!