In physics, optical depth or optical thickness is the natural logarithm of the ratio of incident to transmitted radiant power through a material. Thus...

Optical depth in astrophysics refers to a specific level of transparency. Optical depth and actual depth, τ {\displaystyle \tau } and z {\displaystyle...

1–2 km—and has the equivalent optical depth 0.1–0.2 km at the wavelength 2.2 μm. The normal optical depth is 0.1–0.2. The optical depth of the λ ring shows strong...

modulated by the optical depth to the viewer (i.e. 1/e times the emission at 1 optical depth, 1/e2 times the emission at 2 optical depths, etc.). Near...

is related to optical depth and to absorbance as T = e − τ = 10 − A , {\displaystyle T=e^{-\tau }=10^{-A},} where τ is the optical depth; A is the absorbance...

Rosseland optical depth An extinction coefficient of an atmosphere, which describes the net opacity to radiation at a given depth. See optical depth. rotation...

around 15 μm. The power law mentioned above allows estimation of the optical depth τ {\displaystyle \scriptstyle \tau } of the main ring: τ l = 4.7 × 10...

In optics, optical path length (OPL, denoted Λ in equations), also known as optical length or optical distance, is the length that light needs to travel...

Penetration depth is a measure of how deep light or any electromagnetic radiation can penetrate into a material. It is defined as the depth at which the...

Optical Depth The optical depth feedback is determined by the increasing optical depth of the high clouds with rising temperatures. The optical depth...

optical depth is proportional to the number of absorbers and scatterers along that length, typically increasing with decreasing altitude. The optical...

related to optical depth by A = τ ln ⁡ 10 = τ log 10 ⁡ e , {\displaystyle A={\frac {\tau }{\ln 10}}=\tau \log _{10}e\,,} where τ is the optical depth. Spectral...

temperatures evaporating water into the atmosphere, increasing its optical depth. This positive feedback loop means the planet cannot cool down through...

proportion of dust in the rings (between 20% and 70%) is high, while their optical depth is low to moderate, at less than 0.1. Uniquely, the Adams ring includes...

MOLA Digital Elevation Map (DEM) were used to calculate atmospheric optical depth (AOD) over northern and southern walls of Valles Marineris. On northern...

optically thin. Starlight traveling through a kiloparsec column undergoes about a magnitude of extinction, so that the optical depth ~ 1. An optical depth...

in a line toward the observer. Another name for this phenomenon is depth from optical expansion. The dynamic stimulus change enables the observer not only...

In visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual percept...

Earlier Voyager observations of density waves in the A and B rings and an optical depth profile had yielded a mass of about 0.75 Mimas masses, with later observations...

a value known as the optical depth due to microlensing. (This is not to be confused with the more common meaning of optical depth, although it shares some...

droplets with a smaller size. The increase in number density increases the optical depth of the cloud, which results in an increase in the cloud albedo making...

constraints on the Hubble constant from the Hubble Space Telescope. [a] ^ Optical depth to reionization improved due to polarization measurements. [b] ^ <0...

measurements. These include measuring the ozone layer, haze (aerosol optical depth), and the total column water vapor. The project began in May 1988, when...

different paths through the atmosphere and so determine the difference in optical depth between the two columns (Alternative a solar atlas can be employed,...

the plasma becomes opaque, equivalent to an optical depth of approximately 2⁄3, or equivalently, a depth from which 50% of light will escape without being...

it ranges from 56% to 73% depending on the minimum optical depth considered (lower when optical depth is large, and higher when it is low, such that subvisible...

measures, including absorbance (also called "optical density") and optical depth (also called "optical thickness") All these quantities measure, at least...

(12 July 2022). "Volcanic stratospheric sulfur injections and aerosol optical depth during the Holocene (past 11500 years) from a bipolar ice-core array"...

of 35,000 K at optical depth 150, near the sonic point or very approximately what might be called a physical surface. At optical depth 0.67 the radius...

related to Optical illusion. Optical Illusion Examples by Great Optical Illusions Optical Illusions & Visual Phenomena by Michael Bach Optical Illusions...