In a YDSE with λ=500 nm, transparent strips A, B and C have: A: thickness 5 μm, n=1.5; B: thickness 1.5 μm, n=2.5; C: thickness 0.25 μm, n=2. Match each strip arrangement in List I with the fringe order at the original central point P in List II.
Physics · Wave Optics
In a YDSE with λ=500 nm, transparent strips A, B and C have: A: thickness 5 μm, n=1.5; B: thickness 1.5 μm, n=2.5; C: thickness 0.25 μm, n=2. Match each strip arrangement in List I with the fringe order at the original central point P in List II.
List 1
(A) Only strip B over slit I
(B) Strip A over slit I and C over slit II
(C) Strip A over slit I and B+C over slit II
(D) Strips A+C over slit I and B over slit II
List 2
(P) First bright
(Q) Fourth dark
(R) Fifth dark
(S) Central bright
Options