Monochromatic, coherent light is used in a Michelson Interferometer. One of the movable mirrors is shifted by 1.625 10-m. You see 50 pairs of bright and dark fringes passing the observation screen (or detector). What is the wavelength of the light? Please round the result to a whole number.

Monochromatic, coherent light is used in a Michelson Interferometer. One of the movable mirrors is shifted by 1.625 10-m. You see 50 pairs of bright and dark fringes passing the observation screen (or detector). What is the wavelength of the light? Please round the result to a whole number.

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Question

could you please explain the formula -- lambda = 2d/n
correct answer is 325 or 650?

Monochromatic, coherent light is used in a Michelson Interferometer. One of the movable
mirrors is shifted by 1.625 - 10 m. You see 50 pairs of bright and dark fringes passing the
observation screen (or detector). What is the wavelength of the light? Please round the result to
a whole number.

Expert Solution

Step 1: Derived from formula

$2 d sin theta$ $equals N lambda$

Here $theta equals 90$ ° for Michelson interferometer

So it becomes

$2 d equals N lambda$

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