Two closely spaced parallel glass plates are separated by 900 nm. ...

[j.rubin]

Two closely spaced parallel glass plates are separated by 900 nm. What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?
 a. 684 nm
  c. 500 nm
  b. 600 nm
  d. 429 nm

Question 2

A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure. If the internal energy of the gas were U0 before the expansion, what is it after the expansion?
 a. U0
  b. 2U0
  c. 4U0
  d. The change in temperature must also be known to answer this question.

[huda]

Answer to Question 1

B

Answer to Question 2

C