Question

A scientist heats a piece of iron until it is glowing white-hot. He places the metal inside a metal box. He removes all of the air from the inside of the box. After a few seconds, the sides of the box that are not touching the metal begin to feel warm. Which process is most likely responsible for the warming?
convection

convection current

radiation

evaporation

Answer 1

Radiation, its the only type of energy transfer that does not require matter to pass through 

Answer 2

A scientist heats a piece of iron until it is glowing white–hot. He places the metal inside a metal box. He removes all of the air from the inside of the box. After a few seconds, the sides of the box that are not touching the metal begin to feel warm. Which process is most likely responsible for the warming?

radiation