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...

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...

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...

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

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

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...

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

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...

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...

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...

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...

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

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

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

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

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...

this case, there is scattering of radiation as well as absorption. The optical depth for a slant path is τ′ = mτ, where τ refers to a vertical path, m is...

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...

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...

ring's radial width ranges from 5 to 300 km (3 to 200 mi) while its optical depth ranges from 0.004 to 0.7. The irregular width of the Q1R ring resembles...

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...

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

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...

τ ν ( s 1 , s 2 ) {\displaystyle \tau _{\nu }(s_{1},s_{2})} is the optical depth of the medium between positions s 1 {\displaystyle s_{1}} and s 2 {\displaystyle...

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