Arrange these in ascending order of wavelength while propagating through different medium.

(A) Light propagating in air
(B) Light propagating in water
(C) Light propagating in diamond
(D) Light propagating in glass

Choose the correct answer from the options given below :

(C) < (D) < (B) < (A)

Wavelength of light in a medium is given by

$\lambda = \frac{\lambda_0}{\mu}$

Since $\mu_a<\mu_w < \mu_g < \mu_d$

$\Rightarrow \lambda_a > \lambda_w >\lambda_g > \lambda_d$