An air bubble inside glass slab (n = 1.5) appear from one side at 6 cm and from other side at 4 cm. Then the … cm (A) 5 (B) 10 (C)…
Answers:
The correct option is (C) 15.
Explanation:
η = [(real depth) / (apparent depth)] = (x/y)
∴ x = ny
y = apparent depth = 6 + 4 = 10 cm
hence x = 10 η = 10 × 1.5 = 15 cm
i.e. thickness of glass slab is 15 cm.