A certain blue-green light has a wavelength of 600 nm in air. Show that its wavelength in water, where light travels at , of its speed in air, is 450 nm. Show that its speed in Plexiglas, where light...

A certain blue-green light has a wavelength of 600 nm in air. Show that its wavelength in water, where light travels at
, of its speed in air, is 450 nm. Show that its speed in Plexiglas, where light travels at
 of its speed in air, is 400 nm. (1 nm
 m)