What's this price of equipment?
Discussion
Griffin & George - well known makers of scientific and teaching equipment.
I suspect that the thing on top is a lamp? With provision for focussing lenses, colour filters and a slot to cast a beam of light across the disk, where the clips would hold ?prisms? ?other lenses? and the protractor disc demonstrate the angle through which the light has, as you say, been refracted. So a demonstration refractometer, for school or university use.
JOhn
I suspect that the thing on top is a lamp? With provision for focussing lenses, colour filters and a slot to cast a beam of light across the disk, where the clips would hold ?prisms? ?other lenses? and the protractor disc demonstrate the angle through which the light has, as you say, been refracted. So a demonstration refractometer, for school or university use.
JOhn
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