Question

the speed of light is 3*100000000. its speed is the glass is 2*100000000. calculate its refractive index

Answer 1

we know that refractive index n=speedoflightinmediumspeedoflightinvacuum

where c=3×108m/s

1.5=vc

v=1.53×108

v=2×108m/s

For critical angle we will use snell's law

C is critical angle

nglasssinC=nairsin90 nair=1

sinC=nglass1=1.51

C=41.8o