# When a glass prism of refracting angle 60^(@) is immersed in a liquid its angle of minimum deviation is 30^(@). The critical angle of glass with r

48 views
in Physics
closed
When a glass prism of refracting angle 60^(@) is immersed in a liquid its angle of minimum deviation is 30^(@). The critical angle of glass with respect to the liquid medium is
A. 42^@
B. 45^@
C. 50^@
D. 52^@

by (84.0k points)
selected

._lmu_g=(sin((A+delta_m)/(2)))/(sin(A/2))=(sin((60+30)/(2)))/(sin(60/2))=(sin45^@)/(sin30^@)
=(1//sqrt2)/(1//2)=sqrt2
._amu_gsinC=._amu_lsin90^@
sinC=(._amu_l)/(._amu_g)=(1)/(._lmu_g)=1/sqrt2impliesC=45^@