Introduction: The equipment supplied comprises an arrangement of energy sources, measuring instruments, aperture plates, filter plates and target plates, which are mounted on a linear track, in different combinations to suit the laboratory teaching exercise chosen.The track consists of a rigid aluminum frame with twin horizontal rails which incorporates sliding carriages to enable the positions of the instrumentation, filters and plates to be varied.The heat source consists of a flat copper plate 100mm diameter, which is heated from the rear by an insulated electric heating element operating at low voltage for increased operator safety.Heater can be voltage or PID controlled allowing for the temperature set-point to be achieved rapidly and maintained within 0.1°C.The front of the plate is coated with a heat-resistant matte black paint which provides a consistent emissivity close to unity.The surface temperature of the plate is measured by a thermocouple, which is attached to the front of the plate.Radiation from the heated plate is measured using a heat radiation detector (radiometer), which can be positioned along the graduated track on the carriage. Metal plates with different surface finishes are supplied to demonstrate the effect of emissivity on radiation emitted and received. Two black plates, one grey plate and one polished plate, supplied together with a track-mounted carrier which positions the plates in front of the heat source. Each plate incorporates a thermocouple to indicate the surface temperature of the plate.The radiation from the light source is measured using a light meter which can be positioned along the graduated track on the carriage. Filter plates of varying opacity and thickness are supplied to demonstrate the laws of absorption.

Specifications: A heat source with radiometer and a light source with light meter are used where appropriate to demonstrate the principles.The heat source consists of a flat circular plate 100mm in diameter, which incorporates a 216W electric heating element (operating at 24V DC maximum)The PID controller in the heat source allows for fast temperature set-point achievement and control to 0.1°C.The light source consists of a 60W light bulb (operating at 24V DC maximum) mounted inside a housing with a glass diffuser.The heat and light sources, instruments, filters and plates are mounted on an aluminum track with graduated scale, which is designed to stand on the benchtop.