Example 50 The dispersive powers of crown and flint glasses

Last updated: 6/24/2023

Example 50 The dispersive powers of crown and flint glasses are 0 03 and 0 05 respectively The refractive indiccs for yellow light for these glasses are 1 517 and 1 621 respectively It is desired to form an achromatic combination of prism of crown and flint glasses which can produce a deviation of 1 in the yellow ray Find the refracting angles of the two prisms needed