Question

if 'a' is the thickness of the glass slab and 'b' is the vertical shift of an object through it, then refractive index of the glass slab is
please tell me the correct answer
no suddendly​

Answer 1

Answer:

B

n 2 (n 1−1)

n 1 −n

2

Explanation:

Shift due to cubical cavity = m(1−

n

2

1

)

Shift due to the glass slab = (l−m)(1−

n

1

1

)

So, total shift: 0=m(1−

n

2

1

)+(l−m)(1−

n

1

1

)

or,

m

l

=1+

n

2

(n

1

−1)

n

1

(1−n

2

)

or,

m

l

=

n

2

(n

1

−1)

n

1

−n

2