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  1. optics - What is optical density? - Physics Stack Exchange

    For example, an optical density of 3 means that the optical power is attenuated by the factor $10^3$ That would correspond to an attenuation by 30 decibels. If several attenuators are …

  2. How does change in Temperature affect Refractive Index/Optical …

    Sep 25, 2021 · However, optical density has no relation with the density of medium. Kerosene is less dense than water but its optically denser than water. So how exactly is change in …

  3. Why does optical media have different refractive indices?

    4 Optical density is a measure of the refracting power of a medium. In other words, the higher the optical density, the more the light will be refracted or slowed down as it moves through the …

  4. What exactly is "dense" in Optical Density? - Physics Stack Exchange

    May 24, 2022 · It then proceeds to give an example that kerosene oil, being less dense than water, has higher optical density than water, showing that material density and optical density …

  5. Correlation between the refractive index and the density

    Jul 13, 2019 · Is there any correlation between the refractive index and the density of the air, or of a generic material? I have seen this Relation between density and refractive index of medium …

  6. How does optical density relate to mass density and refractive …

    Aug 24, 2013 · 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 …

  7. Why does a higher temperature increase absorption/optical density?

    Jan 12, 2022 · The spectra you give are at temperatures below iodine’s melting point and above its boiling point. The vapor pressure at the higher temperature is higher than at the lower …

  8. Does the optical density of a medium depend upon its mass density?

    Jul 28, 2018 · Does it have any correlation with the mass/number density of the medium? In other words is an optically denser medium must have a greater mass density compared to an …

  9. What is the relationship between physical density and optical …

    Sep 4, 2011 · I read two definitions about optical density and I'm very confused about that 1.the sluggish tendency of the atoms of a material to maintain the absorbed energy of an …

  10. Building an Affordable OD600 Sensor for Cell ... - Physics Forums

    Dec 2, 2022 · Hi all, I'd like to make an home-built OD600 sensor for measurement of cell concentration in suspension by Optical Density. There are several spectrophotometers in the …