The measured brightness temperature is a good approximation to the brightness temperature at the center of the lunar disk because of the narrow antenna beam and because the temperature distribution over the central portion of the moon's disk is nearly uniform.

A typical go-fast is built of fiberglass, with a deep "< tt > V </ tt >" offshore racing hull from usually 30 to 50 feet ( 10 to 15 m ) long, narrow in beam, and equipped with two or more powerful engines, often with more than 1000 combined horsepower.

In one of the pivotal experiments in the history of optics, the young Newton shone a narrow beam of sunlight through a prism to produce a rainbow-like band of colors on the wall.

Spatial coherence typically is expressed through the output being a narrow beam which is diffraction-limited, often a so-called " pencil beam.

Depending on the design of the cavity ( whether the mirrors are flat or curved ), the light coming out of the laser may spread out or form a narrow beam.

The antenna rotates at a steady rate, sweeping the local airspace with a narrow vertical fan-shaped beam, to detect aircraft at all altitudes.

Symmetric parabolic antennas produce a narrow " pencil " beam in both the X and Y dimensions and consequently have a higher gain.

Spoiled parabolic antennas produce a narrow beam in one dimension and a relatively wide beam in the other.

Due to the very narrow electron beam, SEM micrographs have a large depth of field yielding a characteristic three-dimensional appearance useful for understanding the surface structure of a sample.

A " ray box " shines a narrow beam of light ( a " ray ") onto the glass.

; Caster board: Two narrow platforms known as " decks " are adjoined by a rubber or aluminium coated metal beam that houses a strong spring.

Newton observed that when a narrow beam of sunlight strikes the face of a glass prism at an angle, some is reflected and some of the beam passes into and through the glass, emerging as different colored bands.

The narrow locks ( and several bridges ) between Napton and Camp Hill Top Lock in Birmingham were rebuilt to take widebeam boats or barges up to 12 feet 6 inches ( 3. 81 m ) in beam, or two narrowboats.

Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole.

When a gamma-ray burst is pointed towards Earth, the focusing of its energy along a relatively narrow beam causes the burst to appear much brighter than it would have been were its energy emitted spherically.

Lasers are used because they generate a narrow beam over great distances.

He observed that placing another card before or after the narrow strip so as to prevent light from the beam from striking one of its edges caused the fringes to disappear.

The light beam can be very narrow, which makes FSO hard to intercept, improving security.

In electron energy loss spectroscopy ( EELS ) a material is exposed to a beam of electrons with a known, narrow range of kinetic energies.

You can think of a ray of light, in optics, as an idealized narrow beam of electromagnetic radiation.

At 4GHz ( C-band ) a 3-meter dish is required to achieve this narrow of a focus beam.

To ensure accuracy, Blindfire used a very narrow " pencil " beam and tracks both the target and missile.

Repnin, who had a rather narrow face, longish nose, high forehead, and arching brows, looked like a quizzical Mephistopheles.

Around that statue in the green park where children play and lovers walk in twos and there is a glowing view of the whole city, in that park are the rows of marble busts of Garibaldi's fallen men, the ones who one day rushed out of the Porta San Pancrazio and, under fire all the way, up the long, straight narrow lane to take, then lose the high ground of the Villa Doria Pamphili.

In LS AAS the high resolution that is required for the measurement of atomic absorption is provided by the narrow line emission of the radiation source, and the monochromator simply has to resolve the analytical line from other radiation emitted by the lamp.

A little further west, a narrow road closely lined with high walls, Shore Road, leads down to the West Sands and the Harbour.

A go-fast boat, is a small, fast boat designed with a long narrow platform and a planing hull to enable it to reach high speeds.

The Jordan Valley, lying in the lee of high ground on the West Bank, forms a narrow climatic zone that annually receives up to of rain in the northern reaches ; rain dwindles to less than at the head of the Dead Sea.

They described the creature as having a large body ( about high and long ), and long, narrow neck, slightly thicker than an elephant's trunk and as long as the width of the road ; the neck had a number of undulations in it.

Using a plane of light formed by focusing light through a cylindrical lens at a narrow angle or by scanning a line of light in a plane perpendicular to the axis of objective, high resolution optical sections can be taken.

Applications requiring higher reflectivity or greater durability, where wide bandwidth is not essential, use dielectric coatings, which can achieve reflectivities as high as 99. 999 % over a narrow range of wavelengths.

In 2006 the Harzer Schmalspurbahnen Selketal branch was extended into Quedlinburg from Gernrode giving access to the historic steam narrow gauge railway, Alexisbad and high Harz plateau.

Variants include kitten heels ( typically 1½-2 inches high ) and stilletto heels ( with a very narrow heel post ) and wedge heels ( with a wedge-shaped sole rather than a heel post ).

Special purpose hydrogen-alpha narrow bandpass filters as well as aluminum coated glass attenuation filters ( which have the appearance of mirrors due to their extremely high optical density ) on the front of a telescope provide safe observation through the eyepiece.

The Reversing Falls in Saint John, actually an area of strong rapids, provides one example of the power of these tides ; at every high tide, ocean water is pushed through a narrow gorge in the middle of the city and forces the St. John River to reverse its flow for several hours.

This saves valuable space in cities with high population densities and / or narrow streets.

From the same spot, the viewer can observe ships passing through the narrow channel of the historic Vido island ( Νησί Βίδου ) to the north, on their way to Corfu harbour ( Νέο Λιμάνι ), with high speed retractable aerofoil ferries from Igoumenitsa also cutting across the panorama.

Through six weeks of narrow escapes Charles managed to flee England in disguise, landing in Normandy on 16 October, despite a reward of £ 1, 000 on his head, risk of death for anyone caught helping him and the difficulty in disguising Charles, who was unusually tall at over 6 feet ( 185 cm ) high.

The valley is a long, narrow basin below sea level, yet is walled by high, steep mountain ranges.

Because of conservation of potential vorticity caused by the poleward-moving winds on the subtropical ridge's western periphery and the increased relative vorticity of poleward moving water, transport is balanced by a narrow, accelerating poleward current, which flows along the western boundary of the ocean basin, outweighing the effects of friction with the cold western boundary current which originates from high latitudes.

An interesting variation was Ford's VV ( Variable Venturi ) carburetor, which was essentially a fixed venturi carburetor with one side of the venturi hinged and movable to give a narrow throat at low rpm and a wider throat at high rpm.

For the servants the kitchen continued to also serve as a sleeping room ; they slept either on the floor, or later in narrow spaces above a lowered ceiling, for the new stoves with their smoke outlet no longer required a high ceiling in the kitchen.

The tunnel entrance was narrow, about wide and high.

Usually have a relatively high seatpost, a narrow saddle, and a squared fork ( used for one-footed tricks ).

The basic adduction stance, the sidelong stance, and the advancing ( or fighting stance ) are all rather narrow and high.

These islands are rocky, and most have a narrow coastal strip and a central range of hills rising as high as.

In 1871 the town was described as a poor place, with narrow streets, fairly good flat-roofed houses, grass huts, decayed forts and rusty cannon, enclosed by a wall 6 ft. high then recently erected and protected by bastions at intervals.