A ray of light propogates from glass to water .The value of critical angle is
Here, Glass is denser medium : n1=
Water is rarer medium : n2=
Light travels from denser to rarer medium.
Let α be the critical angle.
Now,
sin α=(4/3)/(3/2)
sin α=2/3*4/3
sin α=8/9
Study 40% syllabus and score up to 100% marks in JEE