PDF chapter test TRY NOW

1. Speed of light in air is \(3 \times {10^8}\ ms^{–1}\) and the speed of light in a medium is \(2 \times {10^8}\ ms^{–1}\). Find the refractive index of the medium with respect to air.
  
From the data given,
 
Speed of light in air (\(c\)) \(=\) \(3 \times {10^8}\ ms^{–1}\)
 
Speed of light in a medium (\(v\)) \(=\) \(2 \times {10^8}\ ms^{–1}\)
 
The formula to calculate the refractive index of a medium is,
 
μ=ii
 
Substitute the known values,
 
Refractive index of a medium (\(\mu\)) \(=\)