A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is
a
3 cm
b
5 cm
c
6 cm
d
8 cm
Explanation
Correct Option
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Discussions (10)

Parafc
1 year ago
Apparent displacement ( d) =t (1-1/n)
when t is tickness, and n is refractive index
: d= 9×(1-1/1.5)
d=9×0.33
d=3cm

MhizDee430
1 year ago
Easy formula:
Refractive index = -thickness/Apparent displacement -thickness
n=-t/D-t
Using it to solve the question:
n=-t/D-t
cross multiply
n×D-t=-t
D=-t/n +t
Putting our values
D= -9/1.5 +9
D=-6 +9
D=3m

Daniellenn
2 years ago
A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block.The apparent displacement of the coin is

paulo_pulisic
2 years ago
d=t×(1−
n
1
)
Where:
�
t is the thickness of the glass block.
�
n is the refractive index of the glass.



