What is the refractive index of aluminum?

1.37289
Aluminium or aluminum is a silvery white member of the boron group of chemical elements. It has the symbol Al and its atomic number is 13. For a typical sample of Al the refractive index and extinction coefficient at 632.8 nm are 1.37289 and 7.617691.

How do you find the complex refractive index?

For theoretical calculation of refractive index,apply: R= (n-1) ^2+k^2/ (n+1) ^2+k^2. (a)For R, the Reflectivity, apply: R+A+T=1.

Can you have a refractive index less than 1?

The minimum value of n can be 1, which is the refractive index of a vacuum or air (for which the refractive index is about the same as for a vacuum). Refractive index below 1 means a speed above the speed of light in vacuum,which is not possible in real life.so refractive index below 1 is not possible, Physics.

Do metals have refractive index?

For most of metals, given their high absorption coefficient, the refractive index is high.

What is the refractive index of copper?

Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. For a typical sample of Cu the refractive index and extinction coefficient at 632.8 nm are 0.23883 and 3.415658.

Why do we use complex refractive index?

Light propagation in absorbing materials can be described using a complex-valued refractive index. The imaginary part then handles the attenuation, while the real part accounts for refraction. For most materials the refractive index changes with wavelength by several percent across the visible spectrum.

Is refractive index a complex number?

In reality, refractive index is a complex number comprised of a real part (n) and an imaginary part (k). The real part, as described above, describes the speed of light in the material.

What is the lowest possible refractive index?

Air has the lowest refractive index, but it isn’t mechanically stable. And the lowest refractive index found in solid, naturally occurring materials is 1.39. But now researchers have developed a film made of aluminum oxide that has a refractive index as low as 1.025 but that is mechanically stiff.

Which material has highest refractive index?

The highest refractive index is of Diamond with its value 2.42.

  • Refractive index of glass is 1.5.
  • Refractive index of water is 1.33.
  • Refractive index of ruby is 1.77.