Refractive index is a property of material. It doesn’t depend upon glass thickness. Refractive index is one of optical constants for a material, it can be calculated from other material properties like electron density etc. and as such should not vary with material thickness.
Q. What are the two formulas for refractive index?
Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.
Q. What is the relation between refractive index and thickness?
Thus there is no general relation between refractive index and thickness of glass slab, but if some problems when additional information is available other physical properties of an object can be calculated from refractive index and thickness, for example optical path length.
Q. How do you find the thickness of a glass slab using refractive index?
Let velocity of light in the medium (i.e. through the thickness of the glass slab) be v m/s. Velocity of light in the air be C = 3×108m/s. So the velocity of light in the thickness of the glass slab = Cμ. Here the distance is the thickness of the glass slab.
Q. Is thickness of media affected to refractive index Why?
Answer: No, the thickness of the media has to effect (or affect) on the refractive index. The refractive index of a substance is a physical property of that substance and measures the speed of light (i.e., electromagnetic wave propagation) in that substance compared with the speed of light.
Q. What is the refractive index of concave lens?
The refractive index of the material of a concave lens is μ. It is immersed in a medium of refractive index μ1. A parallel beam of light is incident on the lens.
Q. What is the refractive index of lens?
In terms of definitions, the Refractive Index of a lens is the ratio of the speed of light in a vacuum divided by the speed of light in the lens material. In the case of CR-39 plastics, the Refractive Index is 1.49, meaning that light travels at almost half the speed through it than it does through a vacuum.
Q. What is critical angle for a material of refractive index √ 2?
45°
Q. What is refractive index of glass slab using Travelling microscope?
What may be refractive index for hollow glass slab? Answer. n = 1.
Q. How do you find the refractive index of a liquid using a convex lens and a plane mirror?
Take any one convex lens and find its rough focal length. Take a plane mirror and place it on the horizontal base of the iron stand. Place the convex lens on the plane mirror. Screw tight the optical needle in the clamp of the stand and hold it horizontally above the lens at distance equal to its rough focal length.
Q. What is refractive index of plane mirror?
Mean value of r/n is 0.7280 cm2. The refractive index of the mirror substrate is 1.693. The refractive index of the mirror substrate is precisely determined by forming interference pattern from the scattered laser radiation. The experiment is repeated for different mirror thicknesses and the results are tabulated.
Q. Can you measure the rough focal length of a concave lens?
The rough focal length of a convex lens is obtained by forming sharp image of a very distant object on a screen. This method is not applicable to a concave lens, as image formed by a concave lens is virtual and it can be taken on a screen.
