which is an example of radiation?\no an ice pack is placed on a knee, and the knee cools down.\no a rock is…
which is an example of radiation?\no an ice pack is placed on a knee, and the knee cools down.\no a rock is warmed by an ultraviolet heat lamp.\no hot coffee in a mug causes the mug to warm up.\no cold salt water sinks to the bottom of the ocean.
Answer
Brief Explanations:
Radiation is the transfer of heat energy by electromagnetic waves. An ultraviolet heat lamp emits electromagnetic waves that warm the rock, which is an example of radiation. The ice - pack on the knee is conduction (heat transfer through direct contact). The hot coffee warming the mug is also conduction. Cold salt water sinking in the ocean is related to density differences and convection currents, not radiation.
Answer:
A rock is warmed by an ultraviolet heat lamp.