Question

Critical angle of glass is $\theta_1$ and that of water is $\theta_2$ The critical angle for water and glass surface would be $(\mu_g = 3/2, \mu_w = 4/3)$.

• A. less than $\theta_2$
• B. between $\theta_1$and $\theta_2$
• C. greater than $\theta_2$
• D. less than $\theta_1$

Answer 1

Answer: (C)

As $^{w}\mu_{g} = 9/8 < ^{a}\mu_{w} < ^{a}\mu_{g} $
$ \therefore \theta > \theta_{2} > \theta_{1}$