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, the wavelength of visible light ( about 4000 to 7000 angstroms ) is three orders of magnitude longer than the length of typical atomic bonds and atoms themselves ( about 1 to 2 angstroms ).

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, 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 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.

However, while Apollo has a great number of appellations in Greek myth, only a few occur in Latin literature, chief among them Phoebus ( ; Φοίβος, Phoibos, literally " radiant "), which was very commonly used by both the Greeks and Romans in Apollo's role as the god of light.

However, if light travels at finite speed, the Earth, and therefore the eye piece of the telescope, moves from E to E ′ during the time it takes light to travel from S to E. Consequently, the star will no longer appear in the center of the eye piece.

However the windows in the tower seem to have been little more than slots, making them poor at letting light in, but providing a suitable place to view out.

However, the original accounts mention only a light in the sky, without specifying the moon.

However, precisely because the French thought the Ardennes unsuitable for massive troop movement, particularly for tanks, they were left with only light defences which were quickly overrun by the Wehrmacht.

However, the area has aroused considerable interest from oil companies in the light of the discovery of rich reserves of high grade crude oil elsewhere in Nigeria.

However, they worsen sleep quality by increasing light sleep and decreasing deep sleep.

" However, a Declaration of the Revolutionary Government dated 8 June 2009 stated that while Cuba welcomed the Assembly's gesture, in light of the Organization's historical record " Cuba will not return to the OAS ".

However, another observer cannot benefit until the results of that measurement have been relayed to him, at less than or equal to the speed of light.

However, it should be noted that is a somewhat spurious argument, in that speed of light limitations applies to all information, not to what can or can not be subsequently done with the information.

However, there is also a minority view within some Muslims that capital punishment is not justified in the light of Qur ' an.

However, it does absorb slightly more red light than blue, giving large volumes of water a bluish tint ; increased scattering of blue light due to fine particles in the water shifts the blue color toward green, for a typically cyan net color.

However, on the screen, the light is always found to be absorbed as though it were composed of discrete particles or photons.

However, when this " single-slit experiment " is actually performed, the pattern on the screen is a diffraction pattern in which the light is spread out.

However, the later discovery of the photoelectric effect demonstrated that under different circumstances, light can behave as if it is composed of discrete particles.

However, usage altered over time and during the 18th century, dragoons evolved into conventional light cavalry units and personnel.

However, a Dalek on the bridge of Davros ' ship reports that the Emperor's escape pod is being launched and a white light is seen speeding away from the ship moments before its destruction, leaving a clear route to bring Davros back in the future.

However, one of the consequences of Einstein's theory is that there is no possible physical test that can distinguish between a beam of light as a model of a geometrical line and any other physical model.

However in nonlinear media, such as some crystals, interactions can occur between light and static electric and magnetic fields — these interactions include the Faraday effect and the Kerr effect.