Question on: JAMB Physics - 1990
A light wave of frequency 5 x 1014Hz moves through water which has a refractive index of (\frac{4}{3}). Calculate the wavelength in water if the velocity of light in air is 3 x 108ms-1
A
4.5 x 10-7m
B
6.0 x 10-7m
C
1.7 x 106m
D
2.2 x 106m
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Correct Option: A
(\frac{1}{4}) = (\frac{3 \times 10}{v})
v = 2.25 x 108ms-1
(\lambda) = (\frac{V}{F})
= (\frac{2.25 \times 10^8}{5 \times 10^14})
(\lambda) = 0.45 x 10-6m
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