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Label This Diagram
a - tank full of water
b - real depth
c - apparent depth
d - image of pin
e - second pin
f - pin
Method • 1
Fill tank with water
Measure real depth
Method • 2
Put pin at the bottom of the tank
Put second pin outside the tank at the depth of apparent image
Method • 3
Measure apparent depth
Repeat previous steps by changing water depth
Method • 4
Calculate refractive index for each set
Calculate the average refractive index
Precautions • 1
Measure from the bottom of the water instead of the bottom of the tank
State This Formula
Refractive Index - Depth
n = real depth / apparent depth