Logarithmic scales of measurement
Absorbance is defined as "the logarithm of the ratio of incident to transmitted radiant power through a sample (excluding the effects on cell walls)". Alternatively, for samples which scatter light, absorbance may be defined as "the negative logarithm of one minus absorptance, as measured on a uniform sample". The term is used in many technical areas to quantify the results of an experimental measurement. While the term has its origin in quantifying the absorption of light, it is often entangled with quantification of light which is “lost” to a detector system through other mechanisms. What these uses of the term tend to have in common is that they refer to a logarithm of the ratio of a quantity of light incident on a sample or material to that which is detected after the light has interacted with the sample. The term absorption refers to the physical process of absorbing light, while absorbance does not always measure only absorption; it may measure attenuation (of transmitted radiant power) caused by absorption, as well as reflection, scattering, and other physical processes. (Wikipedia).
Physics - Ch 66 Quantum Mechanics 2: Basic Concepts (4 of 38) Absorber Thickness
Visit http://ilectureonline.com for more math and science lectures! In this video I will examine the ability of material to absorb incoming radiation in the form of photons at various frequencies and energies. Next video in this series can be seen at: https://youtu.be/-kl_JF_8rhU
From playlist PHYSICS 66 - QUANTUM MECHANICS
Light and Optics 7_14 Thin Film Interference
The interefernce caused by reflection with a thin film.
From playlist Physics - Light and Optics
Absorption Coefficient Calculation
https://www.patreon.com/edmundsj If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible. In this video
From playlist Optoelectronic and Photonic Devices
Absorbing radioactivity for beginners: from fizzics.org
Radioactivity is absorbed differently depending upon whether it is alpha, beta or gamma radiation. The differences in absorption and the idea of half thickness is covered Free notes can be copied from here: http://www.fizzics.org
From playlist Radioactivity
Part 7 of a series on electromagnetic radiation: Absorption of EM radiation - explains how radiation of different frequencies is absorbed including reflection, molecular oscillations, Electron excitation, Photoelectric effect, Compton effect (including deriving the Compton formula) and pai
From playlist Electricity & Magnetism
Acids and Bases - Short Revision || CBSE Science || || Infinity Learn Class 9&10
Acids and bases are two types of substances that are fundamental to chemistry. An acid is a substance that donates protons (hydrogen ions, H+) to a solution, while a base is a substance that accepts protons or donates hydroxide ions (OH-) to a solution. There are several ways to define and
From playlist Shorts
Show Me Some Science! Constructive and Destructive Interference
Waves are one way in which energy can be send down a string. When two waves meet, they interact. This interaction is called interference. If two waves add up this is known as "constructive interference" and if they cancel out it's "destructive interference". After the waves interact, they
From playlist Show Me Some Science!
Thermal conductivity fundamentals
Thermal conductivity is the constant of proportionality for heat transfer in response to a temperature gradient. Thermal conductivity can be accomplished by contributions from electrons, phonons, radiation, and convection. Metals have high thermal conduction due to the many free electrons,
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Resistance & Resistivity, Example Problems
Includes four different worked examples for calculating resistance and resistivity. Resistivity is a property of a material that tells you how strongly it resists or conducts the flow of electric current. A low resistivity indicates a material that allows the flow of electric current. Res
From playlist DC Circuits; Resistors in Series and Parallel
Markov Chains - Part 7 - Absorbing Markov Chains and Absorbing States
Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Markov Chains - Part 7 - Absorbing Markov Chains and Absorbing States. In this video, I introduce the idea of an absorbing state and an absorbing Markov ch
From playlist All Videos - Part 1
The interaction between light and the surface upon which it lands is discussed, with the interest of explaining why objects appear the color that they appear. Principles of color subtraction are described and applied to numerous situations. You can find more information that supports this
From playlist Light Waves and Color Tutorial Series
Beer Lambert's Law, Absorbance & Transmittance - Spectrophotometry, Basic Introduction - Chemistry
This chemistry video tutorial provides a basic introduction into spectrophotometry and beer lambert's law also known as beer's law. It briefly explains how a spectrophotometer works. It uses a light source and a monochromator which selects a specific wavelength of light using a prism or
From playlist New AP & General Chemistry Video Playlist
The interaction between visible light and color filters is explained using the incident-absorbed-transmitted model. Numerous examples are done to illustrate the use of the model in predicting the color appearance of objects when viewed through a color filter. You can find more informatio
From playlist Light Waves and Color Tutorial Series
Pigments and Color Subtraction
This video from The Physics Classroom's Tutorial series explains what a pigment is and how it affects the color appearance of an object. The effect of combinations of pigments is discussed and the application of pigments to the world of color printing is explained. Numerous examples and il
From playlist Light Waves and Color Tutorial Series
Astronomy - Ch. 9.1: Earth's Atmosphere (21 of 61) What is the Overlap Effect?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and graphically show the overlap effect of the greenhouse gases: water vapor H2O, carbon dioxide CO2, methane CH4, nitrous oxide NO2, and ozone O3 changes the effectiveness of the absorption o
From playlist THE GREENHOUSE EFFECT
Spectrophotometry introduction | Kinetics | Chemistry | Khan Academy
Spectrophotometry, transmittance, absorbance and the Beer-Lambert Law. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/spectrophotometry-tutorial/v/spectrophotometry-example?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Misse
From playlist Kinetics | Chemistry | Khan Academy
ACI#8 uv vis Spectrophotometry
HSC Chemistry Applying Chemical Ideas uv-vis Spectroscopy
From playlist Y12 Chem Mod 8 Applying Chemical Ideas
Astronomy - Ch. 9.1: Earth's Atmosphere (23 of 61) How is the Lower Atmosphere Heated? (Part 1)
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain how the lower atmosphere heated by our Sun. It turn out much of the visible light and the radiation that comes from the Sun makes it to the troposphere including UV-A. However much of the radi
From playlist THE "HOW IS" PLAYLIST
Energy Of A Photon (Quantum Physics)
This video will explain how to deal with photons, as quantized wave packets of light. #physics #math #science #engineering #quantum #tiktok #NicholasGKK #shorts
From playlist Quantum Mechanics
What Happens When You Put Salt on Orbeez? High Speed Water Absorption Experiment
Get your Action Lab Box Now! https://www.theactionlab.com/ In this video I show you what happens when you blend solid orbeez in a blender. I talk about osmosis and show you how fast super absorbant polymers can absorb water. Then I show you a crazy effect that happens when you put salt on
From playlist The Action Lab Does Chemistry