the critical angle for glass air interface is ic. will the critical angle for glass water interface be greater than or less than ic ? why?

Solution:

For glass-air interface,the formula for critical angle is given by

 sin i_c = 1/^aμ_g
The critical angle i’c for glass water interface is given by
Sin ic' = 1/ ^wμ_g
Now ^wμ_g < ^aμ_g
Sin i'_c > Sin i_c or i'_c > i_c