Thermal Energy Transfer | Energy | Physics THERMAL CONDUCTIVITY
The diffraction effects that cause colour changes in the Liquid Crystals are best viewed with light falling on the strips from behind or to one side of the viewer. If working by a bright window, turn the apparatus side on.
A. Thermal Conductivity Set
The thermal conductivity set comprises four metal bars - copper, aluminium, brass and steel - held firmly together in parallel with a plastic rigid carrier. Each bar has a liquid crystal temperature sensitive strip attached and its conductivity value marked on the back of the carrier. The liquid crystal strips have 8 boxes and change to a green colour at about 40°C. The thermochromic liquid crystal used in the conductivity bars shows temperatures in the range 35 to 45°C. The lowest temperature indication is a coppery red colour at 33°C and the hottest is a blue colour at over 45°C. The 35 to 45°C appears in green.
E8R03213 B. Crookes Radiometer
Demonstrate the conversion of radiation energy into kinetic energy. Rotary vane wheel mounted on a metal tip and equipped with 4 plates, each coloured black on 1 side; housed in an evacuated glass bulb. Height: 210mm. Ball diameter: 80mm.
E8R06893 C. Thermal Energy Bundle
The kit includes a conductivity Star, thermal conductivity of metals app, ball and ring and a Bi-metallic strip.