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when one mirror of a michelson interferometer is moved a distance of 0.5mm observe 2000 fringes what will be the wavelength of light?

when one mirror of a michelson interferometer is moved a distance  of 0.5mm observe 2000 fringes what will be the wavelength of light?
 

Grade:12

1 Answers

Vikas TU
14149 Points
8 months ago
Dear student 
When one mirror is moved by 0.5 mm, the path length is increased by 1.0 mm.
That is 1.0 mm / 2000 fringes,
or 0.00050 mm per fringe.
That is, 5.0 x 10-7 m = 500 nm
= 5000 angstroms.
Hope this will help 
Good Luck 

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