)If the refractive index of glass is 1.55 and the refractive index of air is 1.0003, what is the critical angle for total internal reflection at the glass/air interface?
Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
a)If the refractive index of glass is 1.55 and the refractive index of air is 1.0003, what is the critical angle for total internal reflection at the glass/air interface?
b) If the refractive index of glass is 1.55 and the refractive index of the hydrated ion-selective film is 1.34, what is the critical angle for total internal reflection at the glass/film interface?
![light beam
glass prisms, n,
ion-selective film, n2
(glass slide, n
air, n3
Figure 1. Diagram of the interfacial region of the optical sensor:
ni, n2, and ng are the refractive indexes of glass, film, and air,
respectively, and a̟ is the critical angle. The evanescent wave pen-
etrates about one wavelength into the film (smaller refractive index
medium) and decays exponentially as shown.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbc826e85-88b0-4476-b6a8-2725b72746e2%2F2f13eb92-eeb6-424b-b736-1865060d9ef1%2Fu57p1cd_processed.png&w=3840&q=75)
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