The ratio of the speed of light in the vacuum to the speed of light in a given transparent medium is called the refractive index of the medium.

refractiveindex中文

When the ray of light is traveling from the medium with a higher refractive index to a lower one, for example, water to air, and the angle of refraction formed is 90 ° then the angle of incidence at that point is critical angle.

Refraction of Light: When a ray of light is traveling from one transparent medium to another, it bends its path. This phenomenon is called refraction.

Refractive index of glass

Snells Law of Refraction: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for two transparent medium.

When medium 2 is air having refractive index n2 = 1, and medium 1 have refractive index n1 =  μ, then critical angle θc can be represented by

The Airport Authority Of India will release the official notification for the post of AAI JE Airport Operations Recruitment 2023. The selection process consists of a Written Test (Online) followed by Document Verification, Physical Test, and Voice Test. This is a very good opportunity for candidates who want to be a part of the Indan Aviation Sector. The vacancy is expected to be somewhere around 100. The candidates can have a look at the AAI JE Airport Operations Eligibility Criteria set by the AAI to have a better understanding of the exam.