Plasma at certain density ranges absorbs certain bandwidths of broadband waves, potentially rendering an object invisible.

Since objects can be seen by light in the visible spectrum from a source reflecting off their surfaces and hitting the viewer's eye, the most natural form of invisibility ( whether real or fictional ) is an object that neither reflects nor absorbs light ( that is, it allows light to pass through it ).

Each dissociation absorbs a great deal of energy in a reversible process and this greatly reduces the thermodynamic temperature of hypersonic gas decelerated near the aerospace object.

In terms of physics, an object is said to be dark when it absorbs photons, causing it to appear dim compared to other objects.

; Power temple: An immobile object that absorbs all explosion of an adjacent medium to large bomb or mine.

An object may be not transparent either because it reflects the incoming light or because it absorbs the incoming light.

When an object is pulled in the direction of motion, it gains momentum and energy, but when the object is already traveling near the speed of light, it cannot move much faster, no matter how much energy it absorbs.

Often this phenomenon is associated particularly with infrared radiation, but any kind of electromagnetic radiation will warm an object that absorbs it.

* Secondary qualities are qualities which one's experience does not directly resemble ; for example, when one sees an object as red, the sensation of seeing redness is not produced by some quality of redness in the object, but by the arrangement of atoms on the surface of the object which reflects and absorbs light in a particular way.

As a result of the mutagenic effects of irradiation by an unknown form of energy, Robbie Baldwin possesses the superhuman ability to create a kinetic force field of unknown energy, manifested as iridescent bubbles, around himself which absorbs all kinetic energy directed against him and reflects it with even greater force against whatever object with which he is in contact.

The ( fictional ) Langston Field generator creates a spherical shield around an object ( usually a spacecraft, but cities have been known to deploy them ) which absorbs energy.

Instead, darkness only appears when sources of light are extinguished or obscured, and only persists when an object absorbs a disproportionate amount of the light that strikes it.

but unfortunately the rabbit, on no grounds at all, took up toward this neutral object an attitude of disapproval and that made it for the first time, and in the only intelligible sense, bad.

Therefore, his only recourse was to learn the shape all over again for each new visual experience of the same individual object or type of object ; ;

But, in spite of all this, enough evidence remains to show that the magic square of three must indeed have been the object of a rather extensive cult -- or series of cults -- reaching fullest expression in the Han period.

That community of all creation is, then, the ultimate object of our loyalty and the concrete norm of all moral judgment.

These exceptions, introduced with a good object, had grown into a widespread evil by the 12th century, virtually creating an imperium in imperio, and depriving the bishop of all authority over the chief centres of influence in his diocese.

It is, in some sense, a symmetry of the object, and a way of mapping the object to itself while preserving all of its structure.

The set of all automorphisms of an object forms a group, called the automorphism group.

As with all radar measurements, these rely on measuring the time taken for photons to be reflected from an object.

The main objective of the ATS is to ensure < cite > in the interests of all humankind that Antarctica shall continue forever to be used exclusively for peaceful purposes and shall not become the scene or object of international discord </ cite >.

The justification for attributing life to objects was stated by David Hume in his Natural History of Religion ( Section III ): " There is a universal tendency among mankind to conceive all beings like themselves, and to transfer to every object those qualities with which they are familiarly acquainted, and of which they are intimately conscious.

Interventive methodologies include all those actions taken by the conservator to directly intervene with the material fabric of the object.

One of the guiding principles of conservation has traditionally been the idea of reversibility, that is that all interventions with the object should be fully reversible, and the object should be able to be returned to the state in which it was prior to the conservators intervention.

Another important principle of conservation is that all alterations should be well documented and should be clearly distinguishable from the original object.

If the object point be infinitely distant, all rays received by the first member of the system are parallel, and their intersections, after traversing the system, vary according to their perpendicular height of incidence, i. e. their distance from the axis.

Other object types, including AutoCAD 2006's dynamic blocks, and all of the objects specific to the vertical-market versions of AutoCAD, are partially documented, but not well enough to allow other developers to support them.

Upon completing a jump from all of the four object categories, a jumper may choose to apply for a " BASE number ", which are awarded sequentially .< ref name =" numbers ">

In a shedding game, players start with a hand of cards, and the object of the game is to be the first player to discard all cards from one's hand.

The object of an accumulating game is to acquire all cards in the deck.

Most games begin with a specific layout of cards, called a tableau, and the object is then either to construct a more elaborate final layout, or to clear the tableau and / or the draw pile or stock by moving all cards to one or more " discard " or " foundation " piles.

Each morphism f has a unique source object a and target object b. The expression, would be verbally stated as " f is a morphism from a to b ". The expression — alternatively expressed as,, or — denotes the hom-class of all morphisms from a to b.

and Nagaoka himself recognized a fundamental defect in the theory even at its conception, namely that a classical charged object cannot sustain orbital motion because it is accelerating and therefore loses energy due to electromagnetic radiation.

Generally, an image of a small object is made using a lens to focus the illuminating radiation, as is done with the rays of the visible spectrum in light microscopy.

When any wire ( or other conducting object such as an antenna ) conducts alternating current, electromagnetic radiation is propagated at the same frequency as the electric current.

The " electromagnetic spectrum " of an object has a different meaning, and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.

But the total radiation emitted by a star ( or other cosmic object ) is at most equal to the total nuclear binding energy of isotopes in the star.

One way to measure the distance to an object is to transmit a short pulse of radio signal ( electromagnetic radiation ) and measure the time it takes for the reflection to return.

The electromagnetic spectrum ( usually just spectrum ) of an object is the characteristic distribution of electromagnetic radiation emitted by, or absorbed by, that particular object.

Thermal radiation refers not only to the radiation itself, but also the process by which the surface of an object radiates its thermal energy in the form black body radiation.

Parts of the electromagnetic spectrum of thermal radiation may be ionizing, if the object emitting the radiation is hot enough ( has a high enough temperature ).

Conversely, a decrease in wavelength is called blueshift and is generally seen when a light-emitting object moves toward an observer or when electromagnetic radiation moves into a gravitational field.

* 1987 – Goiânia accident: A radioactive object is stolen from an abandoned hospital in Goiânia, Brazil, contaminating many people in the following weeks and causing some to die from radiation poisoning.

Further, if the size of the object is known, it is possible to predict both the amount of visible light and emitted heat radiation reaching the Earth.

-Area of the object exposed to the solar radiation

X-ray detectors collect individual X-rays ( photons of X-ray electromagnetic radiation ) and count the number of photons collected ( intensity ), the energy ( 0. 12 to 120 keV ) of the photons collected, wavelength (~ 0. 008 to 8 nm ), or how fast the photons are detected ( counts per hour ), to tell us about the object that is emitting them.

Wien's displacement law implies that the hotter an object is, the shorter the wavelength at which it will emit most of its radiation, and also that the wavelength for maximal or peak radiation power is found by dividing Wien's constant by the temperature in kelvins.

Alternatively, metamaterials provide the theoretical possibility of making electromagnetic radiation appear to pass freely through the ' cloaked ' object.

The Yarkovsky effect is a consequence of the fact that change in the temperature of an object warmed by radiation ( and therefore the intensity of thermal radiation from the object ) lags behind changes in the incoming radiation.