What type of heat waves affect the exterior of food, with the heat then spreading inward through conduction?

It is important to remember that infrared waves affect the exterior of the food. Heat on the outside of the food then spreads inward through conduction The result is that the outside of the food browns. Microwaves penetrate the item and cook it from the inside out, so browning does not take place.

Explanation:

hi     (had to add 20 words)