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

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Correct Option
a

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Discussions (10)

clemtommy
12 years ago

does it mean dat,Real deepth-Apparent deepth=apparent displacement?i.e 9-6=3?

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.

samlaz
2 years ago

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