Fresnel lens (Bi-prism in metal holder) Bi-prism in metal holder Object Number: 1971-562 Pt1 type: fresnel lens Image © The Board of Trustees of the Science Museum
Kaleidoscope with stand Associated numbers:- A212473 & B888 (Adrian Whicher 2017-07-04) Kaleidoscope with stand
White light bleached phase reflection hologram of a metal specimen in a tank of water. Made by Dr Watson's research group in 1986 White light bleached phase reflection hologram of a metal specimen in a tank of water
Spectacles, steel D eye protectors with flat smoked glass. Spectacles, steel D eye protectors with flat smoked glass