A 500 nm wavelength light illuminates a soap film with an index ...

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A 500 nm wavelength light illuminates a soap film with an index of refraction 1.33 to make it look bright. If the beam of light is incident normal on the film, what is the minimum thickness of the film?
 
  A) 47.0 nm
  B) 74.0 nm
  C) 94.0 nm
  D) 152 nm
  E) 268 nm

Question 2

If the frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum acceleration of the oscillator change?
 
  A) 2
  B) 4
  C) 1
  D) 1/2
  E) 1/4

[Moriaki]

Answer to Question 1

C

Answer to Question 2

B

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TY

[Moriaki]

You're welcome