Question

if the light of wavelength 5x10^-7 m shines on a pair of slits 1mm apart,how far from the central maximum will the first bright band appear on a screen 1 meter away?

Answer 1

it's formula is ,
$= 2 \times wavelenght \times distance \div width$
$= 2 \times 5 \times {10}^{ - 7} \times 1 \div {10}^{ - 3}$
=0.001