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...

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

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...

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...

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...

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...

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...

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

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

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

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...

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...

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...

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

Mars. Orbiter measurements suggest that the globally-averaged dust optical depth has a background level of 0.15 and peaks in the perihelion season (southern...

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

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...

Jaskot and M. Oey published a paper in the ApJ titled "The Origin and Optical Depth of Ionizing Radiation in the "Green Pea" Galaxies". Six "extreme" GPs...

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...

_{at}}}.} Finally, the number of scattering events can be related to the optical depth b {\displaystyle b} as follows. Since ⟨ r 2 ⟩ ∼ b ℓ mf {\displaystyle...

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...

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...

is related to the optical depth of the atmosphere at this wavelength, OD, by: T = e − O D {\displaystyle T=e^{-OD}} The optical depth itself is given by...

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...

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...

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...