A transparent glass cube of length 
has a small air bubble trapped inside. When seen normally through one surface from air outside, its apparent distance is 
from the surface. When seen normally from opposite surface, its apparent distance is 
. The distance of the air bubble from first surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
: 
Let the real depth from face I is 
.
From (i) and (ii).
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