Refractive index Definition and 272 Threads

I need to calculate the refractive index of a semiconductor material over a wavelength range (1×10-5m - 1×10-9m) and with different values of electron and hole carrier concentrations (i.e. n/p doped). I found this equation that relates those parameters: n+ik = √ [ (εm -...

1.Problem: A vessel is quarter filled with a liquid of refractive index A. the remaining parts of the vessel is filled with an immiscible liquid of refractive index 3A/2. The apparent depth of the vessel is 50% of the actual depth. the value of A is? 1)1 2)3/2 3)2/3 4)4/3 Solution: 1...

Hello all, I had clarified that refractive index of material such as(aluminium, copper, lead, teflon)changes with the temperature. the refractive index change even for this temperature range: -196 to 25°C ? I need to know like any law which gives a direct relationship between 1)the density and...

Hello all, I want to know that refractive index of materials like cooper, zinc, aluminium, teflon, PMMA varies with the application of heat from room to 100°C and for negative temperatures 77k to 300k. thanks in advance.

I know that the refractive index is determined by a material's dielectric constant and magnetic permeability. It's also true that we can treat the refractive index as a complex function with the imaginary part giving you an absorption spectrum. You can then get the index of refraction from...

Hi, I'm new to the forum as I'm struggling to find answers with an internet search. I've seen Snell's Law stated as n sin theta = constant. How does this arise from its more familiar form of n1sintheta1 = n2sintheta2? I can't work it out. Thanks for reading!

Refractive index on each side of a rectangular cube parallelepiped: n1, n2, n3 Is this correct: n1=n2=n3? http://image.bayimg.com/01c243801d8868097dbe98fb599b0d6aa9fb2e7d.jpg

I have a process of thought and would like to run past some other minds to point out if I am incorrect in my thinking. I am looking into conductivity in high frequencies and a lot of papers I am looking up list a complex refractive index. They list something as in nAg = 0.1453 + j11.3587...

In Ng (the group index for a range of wavelengths), there is an index of refraction n used, but if the medium is dispersive, meaning n is a function of wavelength λ, which n is used? Is it some kind of an average? Or does n not change much over this range of wavelengths? if it doesn't change...

Hi All, I'm trying to create something which has a solid, cylindrical, non-reflective core (assume the core is made out of a black rubber similar to that of a car tyre for instance and 20m in length, but only 1cm in diameter), which has a translucent or transparent plastic layer (or several...

I'm a beginner in quantum optics. I always become confusing when the material's refractive index is complex. This time is about the photonic density of states. We know that if the material is not absorbing or dissipative, meaning the refractive index is a real number, the local photonic density...

Does anyone know any good experimental techniques of measuring refractive index of water?

Asphalt in roads sometimes appears very black through polarizing glasses. I imagine it is possible to measure the angle of reflection with the highest degree of polarization, θ (Brewster's angle), for asphalt. For transparent materials, the refractive index is related to θ, n = tan θ. Is the...

Consider a plane beam of light is falling normally on a material with thickness (d) and refractive index (n), the light partially transmits and partially reflects the light, so the light transmitting the light travels a distance (2nd) coming out of the material have a phase change of ∏ always...

Dear All, If two layers of thickness d1 and d2 stacked on each other and having their absolute refractive index n1 and n2 . Can we find effective refractive index of the combination with this data? Thanks in advance. Jayesh.

Greetings. how to calculate the refractive index, extinction coefficient, absorption coefficient values from the reflectance data. And also suggest me how to measure the transparency of glass. Is there any relation between transparency and refractive index Thanks in advance

Hi! I want to conduct an experiment to investigate the effect of sucrose concentration on refractive index using a laser pointer however I would like to complicate this experiment as this is just a simple how x affects y experiment. It may also seem to straight forward as obviously higher...

The refractive index of H2 = 1.0001594 under the following conditions : P = 101325 Pa T = 273.15 K I cannot find any source for the refractive index of gases under any other conditions 3 Questions : a. What is the pressure gradient for the refractive index? b. What is...

Homework Statement A double concave lens has equal radii of curvature of 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 5.0 cm from the lens. What is the index of refraction of the lens material? A. 1.98 B. 1.9 C. 1.84 D. 2.06 Homework Equations 1/f = (n – 1 ) (1/R1...

Homework Statement We take a sphere (1mm) which has a parabolically changing refractive index, which is given in a function. Homework Equations Depending on the gradient of the refractive in the sphere, how does it correlates with the focal length. The Attempt at a Solution I...

hello i have this question " a liquid has refractive index (n). find the refractive index of this liquid for an observer if the liquid have a velocity (v) to this observer " i have my solution in an attachment please look at it and tell me if it is the right solution thank you...

I would like to find the refractive index of a 1M sorbitol solution. Is there any resource out there that lists refractive indexes? Is there any way to calculate this? Thank you

I want to use the ray tracing software ZEMAX to calculate reflection and absorption using thin metal oxide coatings on for example plastic materials. For this I need is the real and imaginary part of the refractive index in the wavelength region 1-10 micrometer for the metal oxides ZnO, ITO...

Refractive index----- will it travel back along the same way? From the picture http://en.wikipedia.org/wiki/File:RefractionReflextion.svg If I travel a light ray from n2 to n1 , I think the light ray will travel in the opposite direction shown in the first picture. But what about the...

Refractive index depends on the speed of light traveling through that medium.It also depends on the wave length of light.If refractive index of water is 1.33,then for which wavelength is this?

Hello, I was wondering is there a relation between the refractive index of the material and the amount of light the material absorbs (e.g. the higher n means higher absorption)? If so what is then a relation between the intensity of the light and the refractive index? p.s. I am trying to...

refractive index of vacuum is 1 so from this law: n=c/u,we see that u of any light will be equal with c=3*10^8. When two lights(Red(r),Blue(b)) run into the water,red will run faster because refractive index for this lightwave is less than refractive index of blue. So we see that...

This is a spin off from another thread: First there are a couple of mathpages http://mathpages.com/rr/s8-04/8-04.htm and http://mathpages.com/rr/s8-03/8-03.htm that discuss the refractive index model and highlights the differences. The first obvious objection is that the 'medium' must have...

Fact: The refractive index depends on the medium. Also, in general, to study the pulse propagation in a medium, there is a governing model equation (e.g. Non linear Schrodinger equation). My question is: Will there be any relation between the model equation and the refractive index? Why...

Hello I am preparing a lesson on refraction and I've come across a confusing point. In a book I have read, it was said that the optical density of a material is proportional to the refractive index. That is, the greater the optical density, the greater the refractive index. I have however...

Homework Statement An object is located at a distance R from a sphere of radius R. The final image is formed at the same distance R on the other side of the sphere. Calculate the refractive index of the material of the sphere.Homework Equations Since we are dealing with refraction at spherical...

Dear All, thank you for your attention. I am a Biologist and I was wondering if it is possible to translate absorbance λ values into a refractive index value? I found out about the sellmeier equation however it appears to require coefficients that have to be experimentally determined...

Why does light slow down in glass?Can anybody explain why speed of light is slow in glass than in vacuum?

7. The figure shows the path of a portion of a ray of light as it passes through three different materials. What can be concluded concerning the refractive indices of these three materials. (A) n1 < n2 < n3 (B) n1 > n2 > n3 (C) n3 < n1 < n2 (D) n2 = n1 > n3 (E) n1 = n2 < n3 The...

Hi all! I was wondering what will happen if you have two aqueous solutions with the same refractive index and you mix them? Would you end up with the same refractive index as the both solutions or will the refractive index change? In my case I'm using a aqueous 40% wt. potassium...

I'm writing a physics practical report on the refractive index of glass. We performed an experiment in which we measured the incident angle and the refractive angle of light entering a glass block. When plotting sin(ϴa) against sin(ϴg) with the y-intercept as 0 (to satisfy snell's law...

The light travel by it's in a straight line in vacuum, but when we see through the glass the glass has a refractive index which slows down the speed of light so when I see through the glass I don't see the actual distance. Moreover, the gases particles has refractive index and slows down the...

In optics, given the below formula nλ= A + B/λ2 + C/λ4 +... where A, B and C are constants. From the above relationship we can deduce that as the wavelength λ increases, the variation of refractive index nλ decreases. How do we measure the constant value of A,B and C at the first...

When a light wave of the form E=E0eiω hits the surface of a metal, the refractive index if given(considering restoring force of metal atoms and damping equal to 0), by n2=1-p2/ω2 where p=plasma frequency and ω= frequency of the wave. In the case where n2<0, n is complex. and hence the light wave...

Homework Statement I have to design an experiment to determine the difference in refractive indices for different colors. Assume you have : color filters,glass block Homework Equations The Attempt at a Solution I want to do it buy shining a white laser light through...

Hi, can anyone help me out with the refractive index of pure gold at microwave freguencies? (Specifically something close to 2.4 GHz, or your average household microwave oven) Much obliged!

Homework Statement The problem is page 5 on: http://www.physics.ox.ac.uk/olympiad/Downloads/PastPapers/Paper3_2010_.pdf I will just summarise the question: The refractive index of space,n, at a distance r from the sun is given by √(1+5920/r). The light from a distant star is deflected by a...

Refractive index = {speed of light in vacuum}/[speed of light in the medium] This value also equals the ratio{sin i/ sin r} Is there any mathematical proof showing that {sin i/ sin r}= {speed of light in vacuum}/[speed of light in the medium]

What is the physical significance of Refractive Index(RI) ?

Homework Statement A prism of 90-45-45 was placed between a microwave receiver and transmitter. What steps should I take to know the index of refraction of the prism given that its material is not transparent to microwave? I positioned the prism so that a side of the prism is perpendicular to...

Homework Statement Two optically flat glass plates, 16.0 cm long, are in contact at one end and separated by 0.0200 mm at the other end. The space between the plates is occupied by oil with index of refraction 1.45. The index of refraction of the glass plates is 1.55. The plates are...

Newtons Rings Calculations - Values Not Working Out I'm having trouble with a Newtons Rings experiment to determine the refractive index of water. I'm using a sodium light source and a Vernier scale traveling microscope to measure the radius of the bright circles (I don't know if measuring the...

Imagine a dielectric made of of alternating layers of widths A and B and refractive indices (a*) and (b*). Find the effective refractive index, N So in general: c/n = wavelength x frequency = phase speed My thinking was find the total time taken for the wave to propagate through the...

Hi, I have read on a website that the refractive index of glass is related to the number of electrons it has per unit volume. I don't recall which website it was, but is it true? & if so what is the quantitative description behind it? or is it a lot more complicated :) Many thanks for...

What is the refractive index for silicon ?