In a Lloyds's mirror experiment as narrow slit S transmitting a light of wavelength `lambda` is placed 3 mm above a small plane mirror ( as shown). The light coming directly from the the slit and that coming after the reflection interfere on a screen placed at a distance of 90 cm from the slit. Length of mirror is 2 mm and the middle point of mirror is 2 mm from point P.

If the mirror is shifted towards left then how does the fringe pattern on screen changes ?

Options

A. `3.33xx10^(-7)m`
B. `6.67xx10^(-7)m`
C. `1.0xx10^(-7)m`
D. `4xx10s`

Answer

B