12th Class Physics Ray Optics Question Bank Ray Optics Conceptual Problems

  • question_answer
    Can the absolute value of refractive index of a medium be less than unity?

    Answer:

                    Absolute refractive index \[\text{=}\frac{\text{Speed of light in vacuum}}{\text{Speed of light in medium}}\] As the speed of light is maximum in vacuum, so the absolute refractive index of any medium cannot be less than unity.


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