If, however, the figure to be discerned were complicated, composed of several interlocking subfigures, and so on, even the tracing process failed him, and he could not focus even relatively simple shapes among its parts.

If pressed by the sitter for more detail, she may be able to bring the picture more into focus and see more sharply, almost as if she were physically going closer.

If instead we use polar coordinates with the origin at one focus, with the angular coordinate still measured from the major axis, the ellipse's equation is

If one considers a small fluorescent light source ( essentially a bright spot ), light coming from this spot spreads out the further out of focus one is.

If ( x, y ) is a point on the parabola then, by Pappus ' definition of a parabola, it is the same distance from the directrix as the focus ; in other words:

If an aperture is narrow, then highly collimated rays are admitted, resulting in a sharp focus at the image plane.

If an aperture is wide, then uncollimated rays are admitted, resulting in a sharp focus only for rays with a certain focal length.

If enough moisture converges upon the dryline, it can be the focus of afternoon and evening thunderstorms.

If filters that absorb much light or change the colour of the image are used, it is difficult to compose, view, and focus on an SLR, but the image through a rangefinder viewfinder is unaffected.

If the terrorism is part of a broader insurgency, counter-terrorism may also form a part of a counter-insurgency doctrine, but political, economic, and other measures may focus more on the insurgency than the specific acts of terror.

If the focus regarding the Synod of Whitby is on the specific decisions made, then it was simply one of many councils held concerning the proper calculation of Easter throughout Latin Christendom in the Early Middle Ages.

If Regency era is being used to describe the transition between Georgian and Victorian eras, the focus is on the pre-Victorian period from 1811, when the formal Regency began, through 1837 when Queen Victoria succeeded William IV.

If you ’ re doing a working related to communication, wisdom or the powers of the mind, Air is the element to focus on.

If a show runs for a particularly long time then the LD may come in periodically to check the focus of each lighting instrument and if they are retaining their color ( some gel, especially saturated gel, loses its richness and can fade or ' burn out ' over time ).

If text is comprehensible in a document, people tend to focus on the textual content rather than upon overall presentation.

If the focus groups are held in a laboratory setting with a moderator who is a professor and the recording instrument is obtrusive, the participants may either hold back on their responses and / or try to answer the moderator's questions with answers the participants feel that the moderator wants to hear.

In 1999 Keaton narrated the one-hour public-radio documentary, " If I Get Out Alive ," the first to focus on the conditions and brutality faced by young people in the adult correctional system.

If, instead of and, the known quantities are the focal length of the primary mirror,, and the distance to the focus behind the primary mirror,, then and.

If this is the case, then the focus of the organization should be on discovering that constraint and following the five focusing steps to open it up ( and potentially remove it ).

If this is the case, then the organization should focus on mechanisms to create more demand for its products or services.

* If the Specific orbital energy is positive, the body's kinetic energy is greater than its potential energy: The orbit is thus open, following a hyperbola with focus at the other body.

If God made the game, its rules, and the players, then how can any player be free? Some arguments against God focus on the supposed incoherence of humankind possessing free will.

If we want to understand cause, focus on social interaction.

If we want to understand cause, focus on human thinking.

He said: `` If it's all right with you, Mr. Morgan, I'll sleep out here on the couch.

If she sensed any unusual preoccupation on the part of her mother, she did not comment upon it.

If he spun out now, he would join his opponent on the ground.

If it were not for an old professor who made me read the classics I would have been stymied on what to do, and now I understand why they are classics ; ;

`` If you want to see something, he's back on the other side by the trunk of the car ''.

If the man on the sidewalk is surprised at this question, it has served as an exclamation.

If `` Jack the Courtier '' is really to be taken as Swift, the following remark is obviously Steele's comment on Swift's change of parties and its effect on their friendship: `` I assure you, dear Jack, when I first found out such an Allay in you, as makes you of so malleable a Constitution, that you may be worked into any Form an Artificer pleases, I foresaw I should not enjoy your Favour much longer ''.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If it proclaims that the best is yet to be, it always arouses, at least in the young, either a suspicious question or perhaps the exclamation of the Negro youth who saw on a tombstone the inscription, `` I am not dead but sleeping ''.

If the would-be joiner asks these questions he is not likely to be duped by extremists who are seeking to capitalize on the confusions and the patriotic apprehensions of Americans in a troubled time.

If the decision goes wrong, it may be -- as Mr. Stevenson fears -- `` the first step on the slippery path downhill '' to a U.N. without operational responsibilities and without effective meaning.

If you're lyin' out in the hammock at night, and it gets kinda cool -- you know -- you just take these sides with the fringe on -- see -- and wrap 'em right over you.

If the record buyer's tastes are somewhat eclectic or even the slightest bit esoteric, he will find them satisfied on educational records.

If it will simply delay the debates until the qualifications are closed next spring, and then carry all the candidates on a tour of debates, it can provide a service to the state.

Mr. Richard Preston, executive director of the New Hampshire State Planning and Development Commission, in his remarks to the Governors Conference on Industrial Development at Providence on October 8, 1960, warned against the fallacy of attempting to attract industry solely to reduce the tax rate or to underwrite municipal services such as schools when he said: `` If this is the fundamental reason for a community's interest or if this is the basic approach, success if any will be difficult to obtain ''.

`` If the day should ever come that foreign invaders swarm ashore along the Gulf Coast '', the account reads, `` they can count on heavy opposition from a group of commando-trained telephone employees -- all girls.

If we make it established custom that whenever butchery on the highways grows excessive, say beyond 25,000 per annum, then somebody is going to hang, it follows that the more eminent the victim, the more impressive the lesson.

If it comes down too hard on the potential dangers of fallout, it will box the President on resuming atmospheric tests.

`` If William agrees, we should insist on a public debate '', he said at length.

If you want to fight, go down on the sidewalk ''.

If there is anything which we can do in the executive branch of the Government to speed up the processes by which we come to decisions on matters on which we must act promptly, that in itself would be a major contribution to the conduct of our affairs.