Answer
a. $v=2.04\times10^8m/s $.
b. $\lambda=442nm$.
Work Step by Step
The speed and the wavelength of the light will be affected by the fluid.
a. $v=\frac{3.00\times10^8m/s }{1.47}=2.04\times10^8m/s $.
b. The wavelength is reduced by a factor of n.
$$\lambda=\frac{650nm}{1.47}=442nm$$
