If the wavelength of light in vacuum is 469 nm, what is the ...

[melly21297]

If the wavelength of light in vacuum is 469 nm, what is the wavelength of light in a thin film of index of refraction 1.42?
 
  A) 110 nm
  B) 220 nm
  C) 330 nm
  D) 440 nm
  E) 550 nm

Question 2

Apart from the effects of other planets, the orbit of Mercury precesses because
 
  A) Mercury travels faster than any other planet.
  B) Mercury's orbit is nearly circular.
  C) of pronounced variations in Mercury's orbit about the Sun.

[Rilsmarie951]

Answer to Question 1

C

Answer to Question 2

Answer: C

[melly21297]

Both answers were spot on, thank you once again

[Rilsmarie951]

Great! Please up vote