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A source of light of wavelength 5000 A^@...

A source of light of wavelength `5000 A^@` is placed at one end of a table 2 m long and 5mm above its flat well-polished top. The fringe width of the interference bands seen on a screen located at then end of the table is

A

`2 xx 10^-5 m`

B

`2 xx 10^-4 m`

C

`2 xx 10^-3 m`

D

`2 xx 10^-2 m`.

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