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 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is
@Krupa
As we learnt in
Relation between real depth and apparent depth -
- wherein
= Refractive index of medium of incident.
= Refractive index of medium of refraction.
d = distance of object.
= apparent depth
Apparent depth = 5cm from one side
Real depth=1.5 5=7.5 cm
apparent depth = 3cm from other side
Real depth from other side =3 1.5cm = 4.5 cm
Thickness of slab = 7.5cm + 4.5cm = 12cm
12. 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  3 cm deepÂ