Two coloured discs to show the compounding of white light from yellow and blue
Two coloured discs to show the compounding of white light from yellow and blue. Issued by Lord Rayleigh to his Royal Institution audience. (B 4401 A 43 277) R 17575
Two coloured discs to show the compounding of white light from yellow and blue. Issued by Lord Rayleigh to his Royal Institution audience. (B 4401 A 43 277) R 17575