An optical instrument in the form of a small tube containing lenses and prisms, which can be held in the hand to show the composition of the light from a source.
Origin
Mid 19th century; earliest use found in Proceedings of the Royal Society of London.
Definition of hand spectroscope in US English:
hand spectroscope
noun
An optical instrument in the form of a small tube containing lenses and prisms, which can be held in the hand to show the composition of the light from a source.
Origin
Mid 19th century; earliest use found in Proceedings of the Royal Society of London.