Calculate speed of light in water of refractive index 4/3. Given speed of light in air = 3×10^8 m/s
Correct Answer – `2.25 x 10^(8)m//s`
Here, `.^(a)n_(w) = 4//3, v_(a) = 3 xx 10^(8) m//s, v_(w) = ?`
From `.^(a)n_(w) = (v_(a))/(v_(w))`
`v_(w) = v_(a)/(.^(a)n_(w)) = (3xx 10^(8))/(4//3) = 2.25 xx 10^(8) m//s`
We know that,Refractive index=speed of light in air/speed of light in other mediumSo, let speed of light in other medium be a4/3= 3×10^8/aa=3×10^8×3/4a=9×25×10^6a=225×10^6a=2.25×10^8m/sHope it helps….