The required wavelength λ is obtained from 0.5λ = (0.088E-3)/400 Meter Per Fringe which simplifies to
λ = 4.4E-7 Meter Per Fringe. 4.4E-7 Meter Per Fringe translates to 440E-9 or 440 Nanometers Per Fringe.
Maike J.
asked • 03/24/15wavelength of light
When Michelson interferometer was used to measure the wavelength of monochromatic light, it was found that 400 fringes passed the observing microscope when the movable mirror was displaced 0.088 mm. What was the wavelength of light?
Answer is supposed to be 440 nm, please show me how to calculate.
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