What is the difference between reflectivity and reflectance?
Aug 2, 2023 · Reflectance is the ratio of the total reflected power to the total incident power. For an infinitely thick material, reflectivity and reflectance are the same. For thin or layered materials, the …
What is the relation between reflectance and intensity?
Mar 18, 2019 · Absolute reflectance is difficult to measure. Intensity is considerably easier. Reflectance requires a calibrated detector system, or a known reference sample, or both. Even then, the …
Why thickness of metal thin film will affect reflectance?
Jun 13, 2019 · The reflection of the interface of two layers is described by Fresnel's equations. For instance, the reflectance of an Al bulk at 1 micron is around 0.9, this is the reflectance of the …
Calculating absorption coefficient from Transmittance and Reflectance
Nov 27, 2024 · I have some spectrum data from a sample, specifically the Transmittance and Reflectance of the sample. I would like to use this to calculate the absorption coefficient.
Refractive Index and Reflection - Physics Stack Exchange
Aug 14, 2017 · Does the magnitude of the refractive index affect reflection? Will a ray be more reflected the higher the refractive index of the other medium is?
Why is absorbance calculated as $\log_ {10} (1/R)$ and not $1-R$?
Mar 7, 2019 · In near-infrared spectroscopy, when measuring how light is reflected off of opaque samples, absorbance is commonly calculated using the same equation, but by simply substituting the …
optics - How to calculate refractive index from absorbance ...
Nov 10, 2023 · 0 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. …
Fresnel Equations, Refraction, and Metals - Physics Stack Exchange
Feb 18, 2024 · This isn't true, the Fresnel equations do apply to metals. In particular, light can pass through metal films that are sufficiently thin. It's hard to comment further on the claims you speak of …
Calculating Bandgap of material from specular reflectance vs diffuse ...
Jul 17, 2024 · I am looking for some clarification on whether specular reflection data can be used to calculate the bandgap of a material. I am using a UV-vis spectrometer and measuring the reflectance …
optics - How to calculate refractive index $n$ from absorbance ...
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