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Page "Diffraction" ¶ 20
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For and light
For the young child this may be no more than providing food, light or movement.
For those who put their trust in Him He still says every day again: `` Let there be light ''!!
For if I knew the secret of letting this power in my body change directly into electricity, I could rent myself out to the electric companies and with just the power in my body I could light all the lights and run all the factories in the entire United States for some days.
For instance, a local society in the middle of a large city may have regular meetings with speakers, focusing less on observing the night sky if the membership is less able to observe due to factors such as light pollution.
For example, changes in signal strength may be used to specify the sounds to be reproduced by a loudspeaker, or the light intensity of television pixels.
For instance, 202 obsolete Panzer I light tanks were modified by removing the turret and were rebuilt as the Panzerjäger I self-propelled Skoda anti-tank gun.
For example, PAC expression in certain neurons has been shown to alter the grooming behavior in fruit flies exposed to blue light.
For the simple case where the direction of the light beam along the line SE is perpendicular to the motion of the observer then only light emitted at an angle equal to the arc cosine of the ratio of the observer's speed to the speed of light will reach the telescope.
For its time, the game was considered " light years " ahead of the Original Dungeons & Dragons.
For Satan himself transforms himself into an angel of light.
* For some reactions, the presence of electromagnetic radiation, most notably ultraviolet light, is needed to promote the breaking of bonds to start the reaction.
For example, the Diels-Alder reactions can be assisted by heat whereas the cycloaddition is selectively induced by light.
For example, the thermite reaction is used to generate light and heat in pyrotechnics and welding.
For identification by light microscopy, a scraping or swab of the affected area is placed on a microscope slide.
For example, diodes are used to regulate voltage ( Zener diodes ), to protect circuits from high voltage surges ( avalanche diodes ), to electronically tune radio and TV receivers ( varactor diodes ), to generate radio frequency oscillations ( tunnel diodes, Gunn diodes, IMPATT diodes ), and to produce light ( light emitting diodes ).
For waves which do not require a medium, such as light or gravity in general relativity, only the relative difference in velocity between the observer and the source needs to be considered.
For example, if a triangle is constructed out of three rays of light, then in general the interior angles do not add up to 180 degrees due to gravity.
For lower frequencies of EMR up to those of visible light ( i. e., radio, microwave, infrared ), the damage done to cells and also to many ordinary materials under such conditions is determined mainly by heating effects, and thus by the radiation power.
For instance, dark bands in the light emitted by a distant star are due to the atoms in the star's atmosphere.
For low-frequency radiation ( radio waves to visible light ) the best-understood effects are those due to radiation power alone, acting through the effect of simple heating when the radiation is absorbed by the cell.
For example, the sentence " The coat is red " has no observer, the sentence " We see the coat as red " ( where " we " indicates observers ) appears more specific in context as regards light waves and colour as determined by modern science, that is, colour results from a reaction in the human brain.

For and we
For several weeks we eyed one another almost like sparring partners, and then one day Uncle was slightly indisposed and stayed home ; ;
For better or for worse, we all now live in welfare states, the organizing principle of which is collective responsibility for individual well-being.
For better or worse we cannot regard `` imitation '' in the arts in the simple mode of classical rationalism or detached realism.
For answers to such questions we must turn to the anthropologists, the biologists, the historians, the psychologists, and the sociologists.
For what we propose, however, a psychoanalyst is not necessary, even though one aim is to enable the reader to get beneath his own defenses -- his defenses of himself to himself.
William Wimsatt and Cleanth Brooks, it seems to me, have a penetrating insight into the way in which this control is effected: `` For if we say poetry is to talk of beauty and love ( and yet not aim at exciting erotic emotion or even an emotion of Platonic esteem ) and if it is to talk of anger and murder ( and yet not aim at arousing anger and indignation ) -- then it may be that the poetic way of dealing with these emotions will not be any kind of intensification, compounding, or magnification, or any direct assault upon the affections at all.
For this purpose we now draw upon data from sociological and psychological studies of students in American colleges and universities, and particularly from the Cornell Values Studies.
For this concept of an Advisory Board, ancillary to the Board of Trustees, we are indebted to the late President of Harvard University, A. Lawrence Lowell, a master of the subject of the structure of cultural institutions and their administration.
For example, when the film is only four minutes old, Neitzbohr refers to a small, Victorian piano stool as `` Wilhelmina '', and we are thereupon subjected to a flashback that informs us that this very piano stool was once used by an epileptic governess whose name, of course, was Doris ( the English equivalent, when passed through middle-Gaelic derivations, of Wilhelmina ).
For vector spaces over non-algebraically closed fields, we still need to find some substitute for characteristic values and vectors.
For the marksman, we study sets of five shots ( Af ) ; ;
For example, we are interested in the number of bull's-eyes, not which shots were bull's-eyes.
For example, the marksman gets 5 shots, but we take his score to be the number of shots before his first bull's-eye, that is, 0, 1, 2, 3, 4 ( or 5, if he gets no bull's-eye ).
For purposes of sample selection only ( individual tests were given later ) we obtained group test scores of reading achievement and intelligence from school records of the entire third-grade population in each school system.
For our present purposes we assume that the sole subject of bargaining is the basic wage rate ( not including productivity improvement factors or cost-of-living adjustments ), and it is this basic wage rate which determines the level of costs.
For almost a hundred years we relied upon state courts ( subject to review by the Supreme Court ) for the protection of most rights arising under national law.
For the use of students and future restorers, a full, day-by-day record was kept of all three undertakings, complete technical reports on what we found and what we did.
For convenience we chose a stronger pigment, unknown to the early Italians or to Brumidi, titanium oxide, reserving the active lime white for highest lights, put on at the end of the day's stint.
For phosphor to fiber and fiber to air surfaces, and assuming Af, we obtain Af percent.
For the further discussion, we shall thus assume an electron optical resolution of 80 Af and phosphor screen resolution of 60 Af.
For the second we might have to choose the volume of reactor or amount of cooling to be supplied ; ;
For a single stage we may define Af where the maximization is by choice of Af.
For another moment we didn't talk, then she began to weep.
For it is primarily in community that we know and experience spirit.

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