Two slits enabled observers to watch across the river.

Two slits are illuminated by a plane waveGeometry for far field fringesMuch of the behaviour of light can be modelled using classical wave theory.

Two small ridges run along the binding, corresponding with slits in the boot.

Two types of diffraction are distinguished, depending upon the separation between the source and the screen: Fraunhofer diffraction or far-field diffraction at large separations and Fresnel diffraction or near-field diffraction at close separations.

Two forces converged to initiate the PDB: 1 ) a small but growing collection of sets of protein structure data determined by X-ray diffraction ; and 2 ) the newly available ( 1968 ) molecular graphics display, the Brookhaven RAster Display ( BRAD ), to visualize these protein structures in 3-D.

Two types of diffraction contribute to RHEED patterns.

Two double-slit electron diffraction experiments are proposed to discriminate between QM and SEDS

Two twelfth grade students from La Ronge, Northern Saskatchewan, won science fair gold medals for investigating and eventually duplicating the phenomenon, which they determined to be caused by the diffraction of distant vehicle lights.

Two types of bone can be identified microscopically according to the pattern of collagen forming the osteoid ( collagenous support tissue of type I collagen embedded in glycosaminoglycan gel ):

Two point sources will each produce an Airy pattern – see the photo of a binary star.

Two large circular currents, one in the northern hemisphere flowing clockwise and one south of the equator moving anticlockwise, constitute the dominant flow pattern.

Two bars twisted in opposite directions created the common chevron pattern.

Two Chinese variant names for high grades of shiitake are dōnggū (, " winter mushroom ") and huāgū ( 花菇, " flower mushroom ", which has a flower-like cracking pattern on the mushroom's upper surface ); both are produced at lower temperatures.

* Figure 8 – Two skiers on opposite sides of the wake ski while the boat drives in the pattern of a figure 8.

The Two Step and various Western promenade or pattern couples dances are unique to country western dancing.

Two races, Central Asian P. r. centralasica and P. r. theresae in the Atlas Mountains of Morocco, have been proposed, but the slight differences in size and colour show no consistent geographical pattern.

Two red horizontal bands encase a wide white band in a 1: 2: 1 ratio ; centered on the white band is a disk with a blue and white wave pattern depicting the sea on the lower half and a gold and white ray pattern depicting the sun on the upper half ; a Polynesian canoe rides on the wave pattern ; the canoe has a crew of five represented by five stars that symbolize the five island groups ; red and white are traditional Polynesian colors.

Two exceptions to this pattern are Ozoplaning with the Wizard of Oz, by Ruth Plumly Thompson, and Lucky Bucky in Oz, by John R. Neill.

Two objects are said to be just resolved when the maximum of the first Airy pattern falls on top of the first minimum of the second Airy pattern ( the Rayleigh criterion ).

Two other murders have already taken place, with an identical pattern.

Mat, like Rand and Perrin, was led away from the Two Rivers on Winternight by Moiraine Damodred, and it was revealed that all three were ta ' veren, threads that create a swirl in the pattern disrupting the surrounding area.

Slightly more developed than the Sonata for Two Clarinets, the piece follows same the fast-slow-fast pattern, but contains more melodic material.

Two incremental improvements over the exponential horn include slightly better support for low frequency extension and a somewhat broader high-frequency coverage pattern.

Two main runways, each about 8, 000 feet long and 150 feet wide, and a taxiway formed a triangle pattern on the flat, arid land.

Two files that are binary compatible will have the same pattern of zeros and ones in the data portion of the file.

In Dale's proposal, this drift from negative uniqueness to positive evaluation of uniqueness is a cyclical trend, since he believes the same pattern can be detected in the literature on identity for the period from 1867 to 1945, from early Meiji times down to the end of World War Two.

Two major snowstorms, icy conditions, and frigid temperatures wreaked havoc across much of the region ... The harsh winter weather was attributed to a negative Arctic Oscillation, which is a climate pattern that influences weather in the Northern Hemisphere.

Two ostinato works survive, a passacaglia and a chaconne, both built on a descending bass pattern ; the passacaglia is perhaps Kerll's most well-known work.

Two or more jugglers share a juggling pattern between them, usually facing each other.

Two minutes later it came again -- a double explosion, followed by a third, sounding more distant.

Two of the vital qualities demanded of a politician by other politicians are that he always keep a confidence and that he keep his word.

Two strong dissents from the majority report of the Joint Economic Committee ( May 2 ) by Senators Proxmire and Butler allege that the New Deal fiscal policy of the Thirties did not work.

Two of the principal addresses were delivered by prominent Protestants, and when the speaker was a Catholic, one `` discussant '' on the dais tended to be of another religious persuasion.

Two of the fluids showed a high-positive normal pressure when undergoing shear, and two showed small negative pressures which were negligible in comparison with the amount of the positive pressures generated by the other two.

Two companies now had headquarters with Clark J. Wait, who by then had his own drugstore at Factory Point -- the `` Northern Union Telegraph Company '' and the `` Western Union ''.

Two metabolites ( 1, and 2 ) ) of p-aminobenzoic acid ( PABA ) which act as cofactors for the hydroxylation of aniline by acid-fast bacteria are biosynthesized from Aj.

Two millions were added to what had been set aside for it in Mrs. Meeker's lifetime, and the proviso made that as long as Brian Thayer continued to discharge his duties as administrator of the fund to the satisfaction of the board of trustees ( hereinafter appointed by the bank administering the estate ) he was to be retained in his present capacity at a salary commensurate with the increased responsibilities enlargement of the fund would entail.

I was reminded, amusedly, by a poem of Kenneth Patchen's called The Murder of Two Men by a Young Kid Wearing Lemon Colored Gloves, which Patchen himself read on a record against jazz background.

-- Two errors by New York Yankee shortstop Tony Kubek in the eleventh inning donated four unearned runs and a 5-to-2 victory to the Chicago White Sox today.

-- Two Americans and seven Cubans were executed by firing squads today as Castro military tribunals began decreeing the death penalty for captured invasion forces and suspected collaborators.

Two members of the Democratic-endorsed majority on the school board said they probably would vote to appeal a ruling by the state Board of Education, which said yesterday that the school committee acted improperly in its appointment of the coordinator, Francis P. Nolan 3rd, the Democratic-endorsed committee chairman, could not be reached for comment.

Two works by Mauss in particular proved to have enduring relevance: Essay on the Gift, a seminal analysis of exchange and reciprocity, and his Huxley lecture on the notion of the person, the first comparative study of notions of person and selfhood cross-culturally.

Two binary abaci constructed by Dr. Robert C. Good, Jr., made from two Chinese abaci

Two hundred years later western and central Anatolia came under Roman control, but it continued to be strongly influenced by Hellenistic culture.

He stated that he acquired many of his writing techniques from three books, " Narrative Technique " by Thomas Uzzell, and " The Only Two Ways to Write a Story " plus " Twenty Problems of the Short-Story Writer ", both by John Gallishaw.

Seven stories are inspired by a nursery rhyme: And Then There Were None by Ten Little Indians ; One, Two, Buckle My Shoe by One, Two, Buckle My Shoe ; Five Little Pigs by This Little Piggy ; Crooked House by There Was a Crooked Man ; A Pocket Full of Rye by Sing a Song of Sixpence ; Hickory Dickory Dock by Hickory Dickory Dock, and Three Blind Mice by Three Blind Mice.