The wavelength of light in vaccum is lamda_0. When it travels normally through glass of thickness t. Then find the number of waves of light in t thickness of glass (refractive index of glass is mu).

The wavelength of light in vaccum is lamda_0. When it travels normally

1.	The wavelength of light in vaccum is lamda_0. When it travels normally through glass of thickness t. Then find the number of waves of light in t thickness of glass (refractive index of glass is mu).
Answer» SOLUTION :Number of waves is a thickness t of a MEDIUM of refractive index `MU` is number of waves `=(thickn ess)/(wavel en GTH) =t/lamda_m` But `lamda_m=lamda_0/mu`,`therefore` number of waves `(t mu)/lamda_0` Where `lamda_0` is the wavelength of light in VACCUM.