KCET 2015 Physics Solved Paper

Given ε0=permittivity of free space; µ0= permeabilityof free space;ε= permittivity of medium; µ = permeability of medium
Refractive index of medium, n=

c

v

→ (1)
We know c=

1

√µ0ε0

⇒v=

1

√µε

Therefore,n=‌

√µε

√µ0ε0

=√‌

µε

µ0ε0

[from Eq. (1)]