fter light from a source passes through two slits, a first order bright spot is seen on the wall at point P$.$ Which distance is equal to the wavelength of the light?

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Question $19$ options:

$1)$

the extra distance one beam must travel

$2)$

the distance between beams as they leave the slit

$3)$

the distance of point P from the central point of the interference pattern

$4)$

the distance between slits

$5)$

one$-$half of the distance between slits