What is the actinic flux?
[1] The actinic flux describes the number of photons incident at a point, while the irradiance describes the radiant energy crossing a surface. The measured irradiance spectra were used to estimate downwelling actinic flux spectra.
How is actinic flux calculated?
actinic flux, Sλ
- spectral radiance. L(λ,θ,φ) over all directions of incidence of the light, E(λ)=∫θ∫ϕL(λ,θ,φ)cosθsinθdθdφ.
- radiance. is expressed in J m−2 s−1 st−1 nm−1 and hc/λ is the energy per quantum of light of.
- wavelength. λ, the.
- actinic.
- actinic.
- Rayleigh scattering.
- scattering.
- wavelength.
What is the meaning of flux in welding?
Weld flux is a chemical purifying agent, flowing agent or cleaning agent. It is commonly used in metal joining and metallurgy. The primary purpose of weld flux is to prevent oxidation of the base and filler materials during the welding process.
What is the function of flux and filler?
A fluxing agent (or a controlled atmosphere as found in furnace brazing) is required for all brazing and soldering applications. The purpose of the flux is to remove oxides from the base material and to prevent oxidation during the heating process, thus promoting the free flow of the brazing filler metal.
What means actinic?
Actinic: Referring to the ultraviolet (UV) rays from sunlight and UV lamps. Sunburn is an actinic burn. An actinic keratosis is a skin lesion that is the consequence of chronic sun exposure.
What are the 3 functions of flux?
In soldering of metals, flux serves a threefold purpose: it removes any oxidized metal from the surfaces to be soldered, seals out air thus preventing further oxidation, and by facilitating amalgamation improves wetting characteristics of the liquid solder.
What is flux welding good for?
Flux-core welding offers greater penetration, which is good for working with thicker joints. It also allows the welder to travel in all directions and hold the torch in a number of directions. This makes it particularly suited to general repairs, shipbuilding, and other types of manufacturing.
What is flux give an example?
Flux is a chemical purifying agent, flowing agent or cleaning agent. Most commonly, it is used in metal joining and metallurgy. Some examples of flux include: Ammonium chloride. Zinc chloride.
Which color is most actinic?
“Actinic” lights are a high-color-temperature blue light.
How do you use actinic in a sentence?
The sky outside was actinic blue, a strange shade from the darkening storm on its path over the Rocky Mountains. While landing in his rocketship.
What does the flux do to a weld?
The flux helps the ‘flow’ of the molten metal stay in the place where the welder wants it. The flux, being mostly made of non-metallic materials, will not fuse properly into the weld. Instead, a good portion of it gasses off to create an atmosphere that will protect the weld.
Is the actinic flux lower in a thinner cloud?
As expected, below the thicker cloud, the total actinic flux is reduced, in this calculation, to 19% of the clear-sky value. However, for the thinner cloud of optical density 8, the actinic flux below the cloud is actually calculated to be greater than for the cloudless case.
What do stick electrodes do in arc welding?
Stick electrodes are covered in flux. This process is called Shielded Metal Arc Welding since the flux ‘shields’ the weld from atmospheric gases. It is used on a constant current transformer that utilizes a stick electrode holder, commonly called a stinger. Image Credit: Prowelder87, Wikimedia Commons
What is the flux at the base of a cloud?
At the cloud base, the measured flux is 0.56 W m −2 nm −1, compared to a calculated value for a cloudless sky of 0.93 W m −2 nm −1. At the top of the cloud, the flux increased significantly to 2.1 W m −2 nm −1. Inside the cloud itself, the flux increased linearly. FIGURE 3.26. Vertical measurements of actinic fluxes below, in, and above a cloud.
