Blackboard optics - plane mirror.
PIRA: Unknown
An enclosed light source with a cylindrical lens is stuck to the blackboard by a suction cup. The light source produces a pencil of light which is parallel to the blackboard surface. A plane mirror surface is also held to the blackboard by suction cups, and reflects the beam so that the angle of incidence equals the angle of reflection.
Equipment | Storage |
---|---|
Blackboard optics | SW 008 |
or portable set | or 021-22F |