How heat is gained by a sustance inside a metal box by radia

How heat is gained by a sustance inside a metal box by radiation of the sun

Solution

Leslie\'s cube is a metal box with four differently painted sides. If it is filled with boiling water from a kettle you can use either your hands or a thermopile connected to a meter to try and decide which surfaces give out the most heat radiation.Remember that all the sides of Leslie\'s cube are at the SAME TEMPERATURE and so are both sides of the metal plate although some surfaces give out more heat radiation than others