1.

Calculate the speed of light in water of refractive index 4/3.(given C= 3×10^8m/s)

Answer»

Refractive INDEX =speed of light in vacuum(c)/speed of light in WATER
=>
\frac{4}{3} = 3 \times  {10}^{8 } \div a \:
=> a is speed of light in water is
9 \times  {10}^{8}  \div 4
=>
speed of light in water
2.25 \times  {10}^{8}
HOPE it helps you...



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