However, certain ionospheric effects begin to block incoming radiowaves from space, when their frequency is less than about 10 MHz ( wavelength longer than about 30 meters ).

However, when the absorbed electromagnetic radiation is intense, it is possible for one electron to absorb two photons ; this two-photon absorption can lead to emission of radiation having a shorter wavelength than the absorbed radiation.

However it evolved in Generalized MPLS ( GMPLS ) to allow the creation of label-switched paths ( LSPs ) also in not native IP networks, such as SONET / SDH networks and wavelength switched optical network.

However, while the wavelength could never exceed 2L, there was no such limit on decreasing the wavelength, and adding nodes to reduce the wavelength could proceed ad infinitum.

However, a wave like this with definite wavelength is not localized in space, and so cannot represent a particle localized in space.

However, visible light has too long a wavelength ( typically, 5500 angstroms ) to observe diffraction from crystals.

However, in this picture, the polarization completely rotates in a length equal to the wavelength ( roughly one micrometer for visible light ), and it can happen in vacuum.

However, the relationship between the angles of the diffracted beams, the grating spacing and the wavelength of the light apply to any regular structure of the same spacing, because the phase relationship between light scattered from adjacent elements of the grating remains the same.

However, for transmission aerials of NDBs electrical lengthening is extensively applied, because these use antennas which are considerably less tall then a quarter of the radiated wavelength.

However, Ytterbium doped fiber lasers and amplifiers, operating near 1 micrometre wavelength, have many applications in industrial processing of materials, as these devices can be made with extremely high output power ( tens of kilowatts ).

However it provides the possibility for gain in different wavelength regions from the EDFA.

However, when the angle of incidence of the incoming light is increased from zero, the central wavelength of the filter decreases, resulting in partial tunability.

However, lower-frequency dielectric heating, as described in the aforementioned patent, is ( like induction heating ) an electromagnetic heating effect, which itself is the result of the so-called near-field effects that exist in an electromagnetic cavity that is small compared with the wavelength of the electromagnetic field.

However, Wien's other empirical formulation, called Wien's displacement law, is still very useful, as it relates the peak wavelength emitted by a body ( λ < sub > max </ sub >), to the temperature of the body ( T ).

However, spectroscopic data kept being tabulated in terms of wavenumber rather than frequency or energy, since spectroscopic instruments are typically calibrated in terms of wavelength, independent of the value for the speed of light or Planck's constant.

However these are not the only ways to express the law ; expressing it in terms of wavenumber rather than frequency or wavelength is also common, as are expression in terms of the number of photons emitted at a certain wavelength, rather than energy emitted.

However, these boundary regions are a fraction of one wavelength within the near-field.

However, due to the closely associated GFP, the energy released by the luciferase is instead coupled through resonance energy transfer to the fluorophore of the GFP, and is subsequently released as a photon of green light ( peak emission wavelength 510 nm ).

However the soap film is as thin as the visible light wavelength, resulting in interferences.

However, as shown below, is roughly equal to the phonon energy of the minimum wavelength mode, and so we can interpret the Debye temperature as the temperature at which the highest-frequency mode ( and hence all modes ) are excited.

However, because these techniques cannot image beyond 1 wavelength, they cannot be used to image into objects thicker than 1 wavelength which limits their applicability.

However, there are cases in which the eyes of an albinistic person appear red or purple, depending on the amount of pigment present, due to the red of retina being visible through the iris.

However, near-infrared and visible light more easily penetrate the glass.

However, in plant tissues that carry on photosynthesis, carotenoids act to quench electronically excited chlorophyll produced by visible light in a process called non-photochemical quenching, in order to prevent reactions which would otherwise infere with photosynthesis at high light levels.

However, while men develop longer, coarser, thicker, and darker terminal hair through sexual differentiation, women do not, leaving their vellus hair visible.

However, the outline of the Pilots ' logo was clearly visible.

However, surface-obscured images did contribute to the collection of Mars science, including understanding of the existence of several huge high-altitude volcanoes of the Tharsis Bulge that gradually became visible as the dust storm abated.

However, the cubists explored this concept further than Cézanne ; they represented all the surfaces of depicted objects in a single picture plane, as if the objects had all their faces visible at the same time.

However, the Crab Nebula appears as an X-ray source that is a central freely expanding ball of dilute plasma, where the energy content is 100 times the total energy content of the large visible and radio portion, obtained from the unknown source.

However, because base charge is not a signal that is visible at the terminals, the current-and voltage-control views are generally used in circuit design and analysis.

However, the majority of batholiths visible at the surface ( via outcroppings ) have areas far greater than 100 square kilometers.

However in the Acari ( mites and ticks ) there is no visible division between these sections.

However, originally " new moon " referred to the crescent on the first night it is visible, one or two days after conjunction.

However, its atmosphere is opaque to visible light, so its surface remains obscured.

However, the morning fog diffused the light and silhouetted the attacking Soviet forces, making them clearly visible to the Germans.

However, this visible difference is merely a consequence of a deeper distinction: a DCT implies different boundary conditions than the DFT or other related transforms.

However this meant that the halftones might not line up, producing visible lines and boxes in the display of graphics.

However, it has absolutely no effect on visible light or radar.

However, if visible light can pass through it, so can some radiant heat gain ( they are both electromagnetic radiation waves.

However, these measurements have limitations, with various types of radiation ( radio, infrared, visible, ultraviolet etc.

However, he was very visible and outspoken, and immediately pumped an additional $ 6 million into the team's payroll to turn it around.

However, many ESD events occur without a visible or audible spark.

However, these are only silhouettes visible against the background emission of the nebula's equatorial ring.