Answer is option 3. I got answer 2 fringes but why does it shift upwards?
Harshitha Vanam last edited by
the distance travelled by the wave through upper slight is increasing because of the slab .in order to get a central maximum distance travelled by the wave through both the slits should be same .so it should be at a longer distance from the down slab i.e the fringe will form upward
Bodhisatva last edited by
S2P>S1P thus center will shift upwards