The refractive index of air is unity. State True/False.(a) True(b) FalseI have been asked this question in a national level competition.I'm obligated to ask this question of Refractive Index and Numerical Aperture topic in section EM Wave Propagation of Electromagnetic Theory

The refractive index of air is unity. State True/False.(a) True(b) Fal

1.	The refractive index of air is unity. State True/False.(a) True(b) FalseI have been asked this question in a national level competition.I'm obligated to ask this question of Refractive Index and Numerical Aperture topic in section EM Wave Propagation of Electromagnetic Theory
Answer» The CORRECT OPTION is (a) True Easy explanation: The VELOCITY of light in the air medium and the speed of light are both the same. SINCE light travels at maximum velocity in air only. Thus the refractive index N = c/v will be unity.

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