JEE Main202522 Jan 2025Morning ShiftPhysicsWave OpticsActual
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion-(A) : If Young's double slit experiment is performed in an optically denser medium than air, then the consecutive fringes come closer. Reason-(R) : The speed of light reduces in an optically denser medium than air while its frequency does not change. In the light of the above statements, choose the mos
Options
- ABoth ( A ) and ( R ) are true but ( R ) is not the correct explanation of ( A )
- BBoth ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A )
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
B. Both ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A )
Step-by-step solution
( fringe width )= D d In denser medium, fringe come closer Also, = c V V = c Frequency remains same, = _ vac . f _ med f _ med = _ vac .