When the Sun is active, strong solar flares can occur that will hit the sunlit side of Earth with hard X-rays.

When a crystal is mounted and exposed to an intense beam of X-rays, it scatters the X-rays into a pattern of spots or reflections that can be observed on a screen behind the crystal.

When materials are exposed to short-wavelength X-rays or to gamma rays, ionization of their component atoms may take place.

When the energy source is a synchrotron or the X-rays are focused by an optic like a polycapillary, the X-ray beam can be very small and very intense.

When X-rays were first observed from the Crab, a lunar occultation was used to determine the exact location of their source.

When scoliosis is suspected, weight-bearing full-spine AP / coronal ( front-back view ) and lateral / sagittal ( side view ) X-rays are usually taken to assess the scoliosis curves and the kyphosis and lordosis, as these can also be affected in individuals with scoliosis.

When the energy and angle of the inelastically scattered X-rays are monitored scattering techniques can be used to probe the electronic band structure of materials.

When X-rays are incident on an atom, they make the electronic cloud move as does any electromagnetic wave.

When these high speed electrons struck the atoms of the anode, they created X-rays by one of two processes, either Bremsstrahlung or X-ray fluorescence.

When gas between the electrodes is ionized by any means, such as by alpha particles, beta particles, X-rays, or other radioactive emission, Ion-pairs are created and the resultant + ions and dissociated electrons move to the electrodes of the opposite polarity, thus creating an ionization current which may be measured by a galvanometer or electrometer.

When the voltage applied to a Crookes tube is high enough, around 5, 000 volts or greater, it can accelerate the electrons to a fast enough velocity to create X-rays when they hit the anode or the glass wall of the tube.

When an EUV photon is absorbed, photoelectrons and secondary electrons are generated by ionization, much like what happens when X-rays or electron beams are absorbed by matter.

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When aircraft are no longer helpless on airfields, they are no longer vulnerable to Aj.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??

When asked later why he did it, Corbett answered that " Providence directed me ".

When a radiant energy source is directed at a Crookes radiometer, the radiometer becomes a heat engine.

When the problem is assigned to the wrong schema, the student's attention is subsequently directed away from features of the problem that are inconsistent with the assigned schema.

Mikio Naruse directed the wide screen melodrama When a Woman Ascends the Stairs in 1960 ; his final film was 1967's Scattered Clouds.

When in 1958 he directed Rodgers and Hammerstein's musical play Flower Drum Song.

When Selznick moved to MGM in 1933 Cukor followed and directed Dinner at Eight ( 1933 ) and David Copperfield ( 1935 ) for Selznick and Romeo and Juliet ( 1936 ) and Camille ( 1936 ) for Irving Thalberg.

When Hadrian reached Britannia on his famous tour of the Roman provinces around 120, he directed an extensive defensive wall, known to posterity as Hadrian's Wall, to be built close to the line of the Stanegate frontier.

When news of his death at the Council of Constance in 1415 arrived, disturbances broke out, directed primarily against the clergy, and especially against the monks.

When The Second City opened its doors on December 16, 1959, directed by Paul Sill, his mother Viola Spolin began training new improvisers through a series of classes and exercises which became the cornerstone of modern improv training.

When Lincoln moved to resupply the fort with food, Davis and his cabinet directed Beauregard to demand its surrender or else take possession by force.

When Ribbentrop travelled to Rome in November 1937 to oversee Italy's adhesion to the Anti-Comintern Pact, he made clear to his hosts that the pact was really directed against Britain.

When Joseph Stalin got wind of this, he directed Gottwald to drop all pretense of democracy.

When dealing with garbage collection schemes, it's often helpful to think of the reference graph, which is a directed graph where the vertices are objects and there is an edge from an object A to an object B if A holds a reference to B.

When a child is educated at home, or is having his or her education instructed or directed primarily by a parent, then this is usually referred to as Home Education or Home Schooling.

When calculated in this way for the case where ∆ r is a distance along the axis joining the centers of m and M, is directed outwards from to the center of m ( where ∆ r is zero ).

When free-floating, the cell is spherical and around 30 μm across, with long radially directed filose pseudopods as well as distinctive shorter club-shaped ones, so that it resembles a heliozoan.

When Harry Met Sally … is a 1989 American romantic comedy film written by Nora Ephron and directed by Rob Reiner.

When the true size of the fleets became apparent, Graves assumed that de Grasse and de Barras had already joined forces, and prepared for battle ; he directed his line toward the bay's mouth, assisted by winds from the north-northeast.

When a sheet of explosive detonates in contact with a heavy backing surface ( for example, a metal plate ), the resulting blast is primarily directed away from the surface in a single direction.

When the mosquito drinks a sugar solution, it is directed to a crop.

* When a Man Loves ( 1927 ), directed by Alan Crosland, with John Barrymore and Dolores Costello

When Leone directed Once Upon a Time in America, he commented that Robert De Niro was a real actor, unlike Eastwood.

When told that his party, including his own campaign manager, Stephen W. Dorsey, was involved, Garfield directed MacVeagh and James to root out the corruption in the Post Office Department " to the bone ", regardless of where it might lead.

When a radio antenna is mounted above a conductive surface such as the earth, the radio waves directed down toward the surface reflect off it.