What minimum separation between two parallel plates of glass (nglass =1.5) produces constructive interference for the reflected light with a 710 nm wavelength if the gap between the plates is filled with oil with noil =1.8?

The  value is  

Explanation:

From the question we are told that

   The  refractive index of glass is

     The wavelength is  

      The  refractive index of  oil is  

Generally the condition for refractive index is  mathematically represented as

Where  t is the separation between two parallel plates of glass , now at minimum  m which is the  order of maxima produced is   =  0

So

gans

explanation:

vestigial organs (like your appendix) are organs that no longer serve a purpose.