Energy > radiation

Simple observations on transmitting and absorbing radiant energy.

Using the hand as a detector to compare the absorption of radiation.

A simple comparison of the energy radiating from two Bunsen flames.

Comparing the energy radiated from a dull black and a shiny surface.

Shows the properties of radiant energy.

To introduce ideas of heat transfer and thermal capacity.

Students collect data and gain experience in using the inverse-square law for intensity of radiation. They use simple but ingenious apparatus to deduce a value that cannot be measured directly.