Question

an air bubble in a glass slab with refractive index 1.5 ( near normal incidence) is 5 cm deep when viewed from one surface and 3vm deep when viewed from the opposite face . the thickness (in cm) of the slab is
1)8
2)10
3)12
4)16​

Answer 1

Answer:

12

Explanation:

as per your question

apparent depth=5cm from one side

so real depth=apparent depth×refractive index

therefore real depth=5×1.5=7.5

similarly from the other side

3×1.5=4.5

so total real depth=7.5+4.5=12