Unequal refrangibility of two differently coloured lights sleepy Mohammad-Reza Shah Pahlavi

Mohammad-Reza Shah Pahlavi

(Picture shows) Arthur Ashe receives the trophy from the Duke of Kent after he defeated the defending champion Jimmy Connors in four sets

Showing the Lord Mayor's Procession at Westminster Hall

Back row: (left to right): Tony Knapp

Unequal refrangibility of two differently coloured lights sleepy Mohammad-Reza Shah PahlaviExperiment to demonstrate the unequal refrangibility of two differently coloured lights, an illustration of Newton's first proposition, "Lights which differ in colour differ in refrangibility". From Contributions to solar physics, by J Norman Lockyer (London, 1874). Original: engraving. 1874