Students can investigate the relationship between the proportion of transmitted light and the angle of rotation of two polarising filters. A graduated cartridge containing two polarising filters allows students to observe the change in intensity as they are rotated relative to one another.
This is an economical alternative to a mounted optical bench. Each of the acrylic components can be easily aligned against a metre rule (not supplied) so that distances between components can be easily calculated and investigations into magnification and focal length can be carried out.
For student investigation of basic image production. Each “camera” is constructed from a durable, black ABS tube 190mm long and 50×60 end section which can stand repeated use and storage while leaving the students scope to construct the rest of the system.
This unit measures 200 × 70 × 60mm and houses four solar cells, each 50 × 30mm. The cells are connected to 4mm sockets along either side of the base so that they may be connected together in any combination.
Two screw terminals are provided for connecting load resistors etc.
This apparatus has a solar cell mounted on an acrylic base with moveable covers. Students can investigate the output of the cell as different areas are exposed to light making for an excellent investigation at KS3/4 combining electrical measurement with alternative energy topics.