Case : Read the passage and answer the question(s).
The properties of a light such as its speed, frequency and wavelength and properties of the medium like its refractive index give us a lot of information about the interaction of light with that medium. Consider a monochromatic ray of light travelling in vacuum with speed c, wavelength λ and frequency v, enters into a medium of refractive index 1.5.
What will be its new speed?
Answer & explanation
Correct answer: option 3
Use : refractive index = c/v
$\Rightarrow v = \frac{c}{\mu} = \frac{c}{1.5}$