Author Question: When the adjustable mirror on the Michelson interferometer is moved 20 wavelengths, how many fringe ... (Read 63 times)

mcmcdaniel · **on:** Jul 28, 2018

When the adjustable mirror on the Michelson interferometer is moved 20 wavelengths, how many fringe pattern shifts would be counted?
a. 5
b. 10
c. 20
d. 40
e. 80

Question 2

A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared ( = 700 nm) losses. What thickness (in nm) is necessary to produce constructive interference in the reflected infrared radiation?
a. 218
b. 109
c. 55
d. 318
e. 443