Kinda need the diagram/image to give evidence. Light frequency is separated from the singular white beam to the color spectrum from red to blue in frequency strength.
He is renowned both for Westerns such as Stagecoach (1939), The Searchers (1956), and The Man Who Shot Liberty Valance (1962) and adaptations of classic 20th century American novels such as The Grapes of Wrath (1940).