If the source of light used in a young's double slit experiment is changed from red to violet

Options

A. the fringes will becomes brighter.
B. consecutive fringes will come closer.
C. the intensity of minima will increase.
D. the central bright fringe will become a dark fringe.

Answer

B

Explanation

As `beta = (lambda D)/(d) :. Beta prop lambda`
or `(beta_( r))/(beta_(v)) = (lambda_(r ))/(lambda_(v)) gt 1` or `beta_(v) lt beta_( r)`
So, fringe width will decrease, hence consecutive fringes will come closer.