When the sea was visible ahead of them, the relief was as great as if the sun had come out.

When the historian encounters a situation in which he can perceive no visible cause and effect sequence, he should be alert to intuition and unconscious instinct as possible guides.

When quoted unqualified, it usually refers to some appropriate average across the spectrum of visible light.

116 .</ ref > When air condenses it becomes visible, as mist and then rain and other forms of precipitation, and as the condensed air cools Anaximenes supposed that it went on to form earth and ultimately stones.

" When talking about the poem on its own, Hunt claimed it " is a voice and a vision, an everlasting tune in our mouths, a dream fit for Cambuscan and all his poets, a dance of pictures such as Giotto or Cimabue, revived and re-inspired, would have made for a Storie of Old Tartarie, a piece of the invisible world made visible by a sun at midnight and sliding before our eyes ...

When a customer returned to claim the item, it was readily visible and available with no further confrontation required.

When the sun is visible in the polar sky, it appears to move in a horizontal circle above the horizon.

When the stage is once again visible, Rosencrantz and Guildenstern lie in the same position as had the actors portraying their deaths.

When the tags are made visible in the editor, however, they occupy space in the unformatted text and so disrupt the desired layout and flow.

When viewed edge-on, prominent dust-lanes are sometimes visible in absorption against the light of stars in the disk.

When projecting a 3D scene onto a 2D plane, it is necessary at some point to decide which polygons are visible, and which are hidden.

When all the visible frequencies are present in equal amounts, the perceived color of the light is white, and the spectrum is a flat line.

When salt is dissociated, its constituent ions are simply surrounded by water molecules and their effects are visible ( e. g. the solution becomes electrolytic ).

When the rattles were shaken at night during ceremonies, the friction and mechanical stress of the quartz crystals impacting together produced flashes of light visible through the translucent buffalo hide.

When polished and acid etched the classic Widmanstätten patterns of intersecting lines of lamellar kamacite, are visible.

When altars are placed away from the wall of the chancel allowing a westward orientation, only two candles are placed on either end of it, since six would obscure the liturgical action, undermining the intent of a westward orientation ( i. e., that it be visible to the congregation ).

When a visual stimulus is seen before a saccade, subjects are still able to make another saccade back to that image, even if it is no longer visible.

When the character was revealed to be alive in issue # 350 ( Feb. 1989 ), in a story called " Resurrection ," by John Byrne, the face of Johann Schmidt's original body is hidden again, but the Skull's face is fully visible, albeit in his cloned copy of Captain America's body.

When invisible Rakshasas infiltrated Rama's camp, Vibhishana caused them to become visible, and Rama's monkey soldiers destroyed them ( Section 283 ).

When regular cleaning is halted the figure quickly becomes obscured ; it has always needed frequent work for the figure to remain visible.

When first designed the classes were entirely open to the majority of the building, visible even from the upstairs offices, nicknamed " the crow's nest ".

When an inferior planet is visible after sunset, it is near its greatest eastern elongation.

When an inferior planet is visible before sunrise, it is near its greatest western elongation.

When using a z-buffer, a pixel can be culled ( discarded ) as soon as its depth is known, which makes it possible to skip the entire process of lighting and texturing a pixel that would not be visible anyway.

When the light went their way, they went on across the street.

When he was inducted into the Army at Fort Knox, Ky., Hansen's weight had dropped to 180 -- `` too light for me to be at my best '' he said.

When the light from a heated material was passed through a prism, it produced a multi-colored spectrum.

When she made it, the results, starring Margaret Rutherford, were popular and successful light comedies, but were disappointing to Christie herself ; nevertheless, Agatha Christie dedicated the novel The Mirror Crack'd from Side to Side to Rutherford.

When the telescope is at position E it must be oriented toward spot S ′ so that the star light enters the telescope at spot S ′.

When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer.

When the wind blows horizontally, it presses on and moves the ball ; because ping-pong balls are very lightweight, they move easily in light winds.

When Congress overrode his veto, the project had its green light and ground was first broken in 1991.

When light is sent through the sample, it is backscattered by the particles / droplets.

When exposed to sunlight, artificial light, or infrared radiation ( even the heat of a hand nearby can be enough ), the vanes turn with no apparent motive power, the dark sides retreating from the radiation source and the light sides advancing.

When the radiometer is heated in the absence of a light source, it turns in the forward direction ( i. e. black sides trailing ).

When looking at a cross section of a beam of light, the length over which the phase is correlated is called the transverse coherence length.

When open, doors admit people, animals, ventilation, and light.

) When Thomas Young first demonstrated this phenomenon, it indicated that light consists of waves, as the distribution of brightness can be explained by the alternately additive and subtractive interference of wavefronts.

When writing solo passages for the bass in orchestral or chamber music, composers typically ensure the orchestration is light so it doesn't obscure the bass.

When an electron in an excited molecule or atom descends to a lower energy level, it emits a photon of light equal to the energy difference.

When Loki, god of mischief and strife, murdered Baldr, god of beauty and light, he was punished by being bound in a cave with a poisonous serpent placed above his head dripping venom.

When light is sent through the sample, it is backscattered by the droplets.

When the frequency of the strobe equals the frequency of the rotating or vibrating object, the object completes one cycle of oscillation and returns to its original position between the flashes of light, so when illuminated by the strobe the object appears stationary.

When moving from a denser medium into a less dense one ( i. e., n < sub > 1 </ sub > > n < sub > 2 </ sub >), above an incidence angle known as the critical angle, all light is reflected and R < sub > s </ sub > = R < sub > p </ sub > = 1.

When light makes multiple reflections between two or more parallel surfaces, the multiple beams of light generally interfere with one another, resulting in net transmission and reflection amplitudes that depend on the light's wavelength.

When this material condenses in the rain, it forms dust and light sandy materials that resembles ground pumice.