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JAMB UTME
A glass plate 0.9cm thick has a refractive index of 1.50. How long does it take for a pulse of light to pass through the plate?
A.
3.0 x 10-11s
B.
4.5 x 10-11s
C.
3.0 x 10-10s
D.
4.5 x 10-10s
Answer: B
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