Thin Film Interference Solutions

From handout:

4. thickness = 1.05 x 10^-7 m

5. thickness = 96.1 nanometers

1984B5
a) 5 x 10¹⁴ Hz
b) 4.8 x 10^-7 m
c) 1.2 x 10^-7 m
d) 2.4 x 10^-7 m

38. wavelength = 643 nm, which is colored red.
40. 169 nm
43. 27*lambda/n = 2t, so t = 9045 nanometers, or 9.045 x 10^-6 m
45. 2t = n*(640 nm/1.36), and 2t = (n + 1/2)*512 nm/1.36. Solving the system, t = 471 nanometers.