Author Question: A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared (l = ... (Read 61 times)

tatyanajohnson · **on:** Jul 28, 2018

A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared (l = 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

Question 2

The light reflected from a soap bubble (n = 1.40) appears red (l = 640 nm) at its center. What is the minimum thickness (in nm)?
a. 124
b. 104
c. 114
d. 134
e. 234