Physic please help!

posted by .

A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film (n = 1.35) that has air on either side. What is the minimum nonzero thickness of the film, so that destructive interference causes it to look red in reflected light?
nm

  • Physic please help! -

    Wouldnt the thickness be blue lamda/4? ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics please explain

    Can you please explain your answer. How did you get blue lamda. Is it because red and green makes blue?
  2. physic

    How long (in ns) does it take light to travel 1.00 m in vacuum?
  3. physics..HELP??? please

    in physics terms what does vacuum mean?? i thought they meant a vacuum sweeper?
  4. Physics

    5. The surface of a glass plate (index of refraction n3 = 1.50) is coated with a transparent thin film (index of refraction n2 = 1.25). A beam of monochromatic light of wavelength 6.0 X 10^-7 meter traveling in air (index of refraction …
  5. AP Physics B

    A soap bubble of index of refraction 1.43 strongly reflects both the red and the green components of white light. What minimum film thickness allows this to happen?
  6. physics

    Horizontal rays of red light (λ = 660 nm, in vacuum) and violet light (λ = 410 nm, in vacuum) are incident on the flint-glass prism shown in the drawing. The indices of refraction for the red and violet light are nred = 1.662 …
  7. physics

    A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside the diamond, red light (ë = 660.00 nm in vacuum) is refracted at 17.38° with respect to the normal; blue light (ë …
  8. physics

    Question Part Points Submissions Used 1 2 3 4 0/0.37 0/0.37 –/0.37 –/0.37 4/15 1/15 0/15 0/15 Total 0/1.48 ...A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside …
  9. PHYSICS

    Imagine a soap film (air-soapy water-air) of 1 l,m thickness, and refractive index of 1.5 with white light normal to the film. Which wavelengths in the optical range (400 nm to 700 nm) will appear brightest?
  10. Physics (light)

    A soap film is viewed in white light. If the film is much thinner than the wavelength of blue light, what is the appearance of the film?

More Similar Questions