Hi!!!What‘s the difference between:(1) transmission and emission?(2) reflection and scattering?thanx!
an additive is like sugar, to make it sweeter. a presirvative, like salt preserves it, kepping it from rotting.
Preservatives are real and additives are not
Additives are included for many reasons to foods such as colouring, texture, taste and possibly to preserve. Preservatives are added simply to extend the use by dates of foods.
1) Transmission refers to light or other moving energy (such as sound waves) which crosses a boundary of some kind, like the surface of a transparent piece of glass that has air on the other side of the surface from the glass), and then it continues to move away from the boundary on the other side from which it entered. In emission, light or other energy would originate from a source object or medium without first having to enter the material of which the source is made. Thus emission of energy requires that some form of static, or unmoving, energy, such as chemical or stored electrical energy) must be converted into the light or other form of moving energy. This results because energy is conserved, which means that it does not appear from or disappear to nothing: it merely changes from one form to another. 2) In reflection, light or other forms of moving energy that leave the reflecting surface has a single direction of travel when leaving any point on the surface, and that direction makes the same magnitude of angle to the reflecting surface at the reflection point as does the incoming energy to the surface. For scattering, there is no single direction at which the energy leaves the point on the surface that is completely determined by the direction of the incoming energy. However, the incoming energy direction and different directions of the outgoing energy can and usually are related by a probability distribution, with some outgoing directions usually being more likely (and more energetic or brighter) than others.
