An 18 Mm Wide Diffraction Grating Has Rulings of 710

question 29

Multiple Choice

An 18 mm wide diffraction grating has rulings of 710 lines per mm.Light is incident normally on the grating.Monochromatic light of 506 nm wavelength is used.The largest angle from the normal at which an intensity maximum is formed is closest to:

• A)46°
• B)44°
• C)42°
• D)40°
• E)38°

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Definitions:

Unfriendly Witnesses

Individuals called to testify in a legal setting who are either unwilling or hostile, making their testimonies potentially difficult to obtain or unreliable.

Motion Picture Association of America (MPAA)

Since the mid-1940s, the film industry’s principal trade organization. See also Motion Picture Producers and Distributors of America.

Hollywood Ten

A group of film directors and screenwriters who were blacklisted in Hollywood during the late 1940s and 1950s because of their alleged communist ties or sympathies.

Blacklist

The industry-wide purge of alleged Communist influence between 1947 and 1959. All told, about three hundred writers, directors, producers, and actors were rendered unemployable following accusations regarding their political and/or union affiliations.