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1 vote
0 answers
68 views

Refracted rays and reflected rays intensity change [closed]

When light enters medium A to medium B some light is refracted while some reflected. How we can derive their relative brightness?
Samuel Tse's user avatar
3 votes
1 answer
62 views

Can a system of lenses or compound lens have a higher numerical aperture than a single element in the system?

I am attempting to create a simple Abbe condenser for a microscope, which typically consists of two converging lenses. Ideally, I would like to achieve a numerical aperture for the condenser of ...
Yashka Oreza's user avatar
1 vote
0 answers
87 views

How to derive that Optical path length should be stationary from Fermat's principle?

I read above eq. (5.3) in "Optics" by Eugene Hecht Fermat's Principle maintains that the optical path length OPL will be stationary; that is, its derivative with respect to the position ...
Tong Su's user avatar
  • 21
0 votes
0 answers
27 views

How would I account for non-linear refractive index effects in a nitrogen based medium?

I am trying to estimate the clamped intensity of a 90 fs femtosecond laser when it passes through a flow of nitrogen that is exiting a nozzle. Prior to the nozzle, the incoming nitrogen flow is heated ...
Nikkhil Chander's user avatar
1 vote
0 answers
32 views

Refraction of light - Huygens' Principle

To elucidate the rationale behind the bending of light as it transitions between different mediums, Huygens' principle is predominantly employed. The procedure, as demonstrated in this video (link: ...
Voldemort's user avatar
0 votes
0 answers
33 views

Refractive index from absorbance, transmittance or reflectance spectra of thin film, knowing its thickness [duplicate]

I have absorbance (Abs), reflectance (R%) and transmittance (T%) data of TiO2 deposited thin film on FTO glass substrate. The data was collected using UV-Vis spectrophotometer. Also, I know the ...
Mona's user avatar
  • 11
0 votes
0 answers
541 views

How to calculate refractive index from absorbance, transmittance or reflectance spectra?

I have absorbance (Abs), reflectance (R%) and transmittance (T%) data of TiO2 deposited tin film on FTO glass substrate. The data was collected using UV-Vis spectrophotometer. How to calculate ...
Mona's user avatar
  • 11
0 votes
0 answers
56 views

How to calculate refractive index $n$ from absorbance, transmittance or reflectance spectra? [duplicate]

I have absorbance (Abs), reflectance (R%) and transmittance (T%) data of $\rm TiO_2$ deposited tin film on FTO glass substrate. The data was collected using UV-Vis spectrophotometer. How to calculate ...
Mona's user avatar
  • 11
1 vote
1 answer
147 views

Refractive index of titanium dioxide films as a function of wavelength for 400 C ° annealed films

I used UV-Vis/NIR spectrophotometer to extract the measurements of refractive index %R corresponding with wavelengths in the range of 190-1100 nm of TiO2 thin film deposited on FTO glass substrate. ...
Mona's user avatar
  • 11
0 votes
0 answers
25 views

How large is the Group Delay Dispersion for ultrafast light pulse into glass if the refractive index changes linearly?

If an ideal ultrafast pulse with the duration of 1 cycle of light is propagating from air (with n = 1) into glass in the direction normal to the interface, Im also assuming the refractive index n of ...
user2279603's user avatar
1 vote
0 answers
44 views

Can we explain certain light phenomenon like refraction using particle nature of light?

Using Hugyen's principle and wave nature of light, refraction, diffraction are relatively simple to explain but I have been visualing a mental model for a couple of days where the photons on reach the ...
Aritro Shome's user avatar
0 votes
0 answers
82 views

Plano convex lens refraction angles formula

I am designing an optical device with several plano-convex lenses. In order to determine several measurements I need to be able to calculate the resulting refracted angles at the edges of the lens in ...
Birger Evansson's user avatar
0 votes
1 answer
45 views

As we all know a convex lens doesn't exactly converge all rays parallel to it's axis on a single point. So I want to find one such figure

Writing a differential equation for such a figure is an uncomplicated task. It can be accomplished by using snell's law. But the resulting equation probably isn't solvable. I put it in wolfram alpha ...
Arpan Bajpai's user avatar
0 votes
0 answers
120 views

How does an Abbe refractometer actually work?

I'm now in the process of writing a report on a lab work i did with an Abbe refractometer. In all sources i found the working principle of this refractometer is described as such: "Light shines ...
Tom4211's user avatar
0 votes
0 answers
71 views

What will be the state of polarization?

When unpolarized light incident on the first polarizer, the light becomes plane-polarized with intensity equal to half of the initial value and the plane of polarization is parallel to the optic axis ...
Akshat Shrivastava's user avatar

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