Question

speed of light in a medium whose absolute RI is 2.56​

Answer 1

Answer:

For critical angle we will use snell's law

C is critical angle and C=45

o

n

medium

sinC=n

air

sin90 n

air

=1

sinC=

SinC

1

=

sin45

1

n

medium

=1.41

we know that refractive index n=

speedoflightinmedium

speedoflightinvacuum

where c=3×10

8

m/s

1.414=

v

c

v=

1.414

3×10

8

v=2.12×10

8

m/s