Assertion (A): Refractive index of glass with  respect to air is different for red light and violet  light.  

Reason (R): Refractive index of a pair of media depends on the wavelength of light used.  



  • Since angle of refraction of red and violet light is different, their Refractive index is also different
    Angle of Refraction of Red and Violet Light - Teachoo.jpg

  • Refractive Index and Wavelength are related: Refractive index is inversely proportional to wavelength



  • Assertion is true
  • Reasoning is true
  • And reasoning is the correct explanation of assertion 

Correct option: (a) 

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo