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Red light of wavelength 6500 Å from a d...

Red light of wavelength `6500 Å` from a distant source falls on a slit `0.50 mm` wide. Calculate the distance between first two dark bands on each side of central bright band in the diffraction pattern observed on a screen placed `1.8 m` from the slit.

A

`4.68 xx 10^(-3)` cm

B

`4.68 xx 10^(-3)` mm

C

`4.68 xx 10^(-3)` nm

D

`4.68 xx 10^(-3)` m

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