infrared radiation + temperature

all objects are continually emitting and absorbing IR radiation (which is emitted from the object surface)

how does an object hotter than its surroundings react?

emits more IR radiation than it absorbs as it cools

how does an object cooler than its surroundings react?

absorbs more IR radiation than it emits as it warms

what happens with objects at a constant temperature?

rate of IR emission = rate of IR absorption

what colour and surface is the best at emitting and absorbing radiation?

matt black

how can emission be investigated?

• Leslie cube

  • metal cube with different surface faces