In Young's double slit experiment, the fringe width is ` 1 xx 10^(-4) m` if the distance between the slit and screen is doubled and the distance between the two slit is reduced to half and wavelength is changed from `6.4 xx 10^(7) m` to `4.0 xx 10^(-7)m` , the value of new fringe width will be

Options

A. `0.15 xx 10^(-4) m`
B. `2.0 xx 10^(-4) m`
C. ` 1.25 xx 10^(-4) m`
D. `2.5 xx 10^(-4) m`

Answer

D