Wavelengths of light that are allowed to travel are known as modes, and groups of allowed modes form bands.

Wavelengths are small enough that they can be focused into narrow beams by parabolic and horn antennas from a half meter to five meters in diameter.

King and J. C. Wiltse, " Surface-Wave Propagation on Coated or Uncoated Metal Wires at Millimeter Wavelengths ".

The club still meets at Ladywell Swimming Baths, one of the public swimming pools in Lewisham which include Downham Health and Leisure Centre, the Bridge in Sydenham, Forest Hill Pools, now open after refurbishment and Wavelengths in Deptford.

This resulted in the publication of his papers called " Generation of Short Wavelength Waves ", " Measuring Specific Wavelengths with Short Wavelengths ", and other papers.

Wavelengths in the range of 808 nm to 980 nm can be used to join various plastic material combinations.

Wavelengths vary from centimetres to kilometres with periods of seconds to hours respectively.

and on September 13, 2004, at the 2004 Toronto International Film Festival as part of the Wavelengths programming.

Wavelengths reflected by an infrared hot mirror range from about 750 to 1250 nanometers.

Fabricated by precision laser milling techniques, SAW filters are cheaper to produce, can be made to extremely close tolerances, and are stable in operation.

Gaussian laser beams are said to be diffraction limited when their radial beam divergence is close to the minimum possible value, which is given by

All real laser beams have M < sup > 2 </ sup > values greater than one, although very high quality beams can have values very close to one.

These systems use lasers that have a lower tolerance for ORL, and introduce elements into the network that are located in close proximity to the laser.

Here, the size of the scanning volume is determined by the spot size ( close to diffraction limit ) of the optical system because the image of the scanning laser is not an infinitely small point but a three-dimensional diffraction pattern.

* Laser resonators are often described as Fabry – Pérot resonators, although for many types of laser the reflectivity of one mirror is close to 100 %, making it more similar to a Gires – Tournois interferometer.

However, in the early days, even when specific instructions were sent, other labs failed to replicate the laser, it only being made to work in each case following a visit to or from the originating lab or very close contact and dialogue.

This is now highly regulated in the U. S., to the point where almost no U. S. shows have laser beams that go into or close to the audience.

Although there is little publicly available data from the Halite-Centurion series, the results, augmented by experiments on the Nova laser, supported detailed simulations that ignition and net energy gains could be achieved with a few MJ, or energies close to those originally proposed by Nuckolls.

However, only about 1 percent of the night sky is close enough to a natural guide star to use adaptive optics, so various methods to create artificial laser guide stars have been developed, including the sodium laser system developed by the Lawrence Livermore National Laboratory and used by the University of California's Lick and Keck observatories.

The optical loss is nearly constant for any particular laser (), especially close to threshold.

When very close to threshold, the smallest perturbation is able to cause huge swings in the output laser power.

The dimensions of an indoor laser tag arena makes for close quarters, so there is a large design focus on performance and game play under these conditions.

A difficulty arises in that the laser sheets should be maintained close enough together so as to approximate a two-dimensional plane, yet offset enough that meaningful velocity gradients can be found in the z-direction.

The most basic form of a CO < sub > 2 </ sub > laser consists of a gas discharge ( with a mix close to that specified above ) with a total reflector at one end, and an output coupler ( usually a semi-reflective coated zinc selenide mirror ) at the output end.

If laser is fired at close proximity to enemy, laser delivers more damage to enemy.

When it is close enough for some of the reflected laser energy from the target to reach it, a laser seeker detects which direction this energy is coming from and adjusts the projectile trajectory towards the source.

An obvious circumvention would be to aim the laser merely close to the target.

However, the Nutcracker gets too close to a cliff that buckles under its weight and Bush fires his laser into the tank's underbelly.

The mine shafts are populated by spiders, bats and other unknown creatures that are deadly to the touch ; these creatures can be destroyed using the laser, or will also be destroyed if they are close to exploding dynamite.

Powers: Massive strength ; near-invulnerability ; laser vision ; mouth is a nuclear furnace that can disintegrate anything its jaws close upon.

When a dot appears close to the end of the transverse line, the `` moderate '' rating may be further classified according to the position of the dot with respect to the vertical marking denoting the mean age.

their principles of composition stand very close to those which appear in the Homeric epics and the hexameter line.

Often, threading through the overcast, he was forced to fly close to the ground by a low ceiling, skimming above the Winooski or the White River along the line of the broken railroad.

The idea that a curve may come arbitrarily close to a line without actually becoming the same may seem counter to everyday experience.

The close relationship of alternative algebras and composition algebras was given by Guy Roos in 2008: He shows ( page 162 ) the relation for an algebra A with unit element e and an involutive anti-automorphism such that a + a * and aa * are on the line spanned by e for all a in A.

The French moved first to Tirlemont, ( as if to threaten Zoutleeuw, abandoned by the French in October 1705 ), before turning southwards, heading for Jodoigne – this line of march took Villeroi ’ s army towards the narrow aperture of dry ground between the Mehaigne and Petite Gheete rivers close to the small villages of Ramillies and Taviers ; but neither commander quite appreciated how far his opponent had travelled.

The line of attack aims to cramp the batsman, making him play the ball with the bat close to the body.

Since there is no heir to inherit Elimelech's land, levirate custom required a close relative ( usually the dead man's brother ) to marry the widow of the deceased in order to continue his family line ( Deuteronomy 25: 5 – 10 ).

The Alerte was sent ahead, passing close to the leading British ships and then steering sharply to the west over the shoal in the hope that the ships of the line might follow and become grounded.

Goliath eventually stopped close to the bow of Conquérant, opening fire on the new opponent and using the unengaged starboard guns to exchange occasional shots with the frigate Sérieuse and bomb vessel Hercule which were anchored inshore of the battle line.

Foley's attack was followed by Hood in Zealous, who also crossed the French line and successfully anchored next to Guerrier in the space Foley had intended, engaging the lead ship's bow from close range.

The convention in naval warfare of the time was that ships of the line did not attack frigates when there were ships of equal size to engage, but in firing first French Captain Claude-Jean Martin had negated the rule and Saumarez waited until the frigate was at close range before replying.

The final ship of the British line, Culloden under Troubridge, sailed too close to Aboukir Island in the growing darkness and became stuck fast on the shoal.

For example, many commercial contracts are more economically efficient, and create greater wealth, because the parties know ahead of time that the proposed arrangement, though perhaps close to the line, is almost certainly legal.

Some of the main squares, Inman, Porter, and to a lesser extent, Harvard, are very close to the city line, as are Somerville's Union and Davis Squares.

In particular, no subset of the points on the real line gets arbitrarily close to any real number.

On the one hand, Bernard Bolzano ( 1817 ) had been aware that any bounded sequence of points ( in the line or plane, for instance ) has a subsequence that must eventually get arbitrarily close to some other point, called a limit point.

If is any unit vector, the projection of the curl of F onto is defined to be the limiting value of a closed line integral in a plane orthogonal to as the path used in the integral becomes infinitesimally close to the point, divided by the area enclosed.

Tracing a line from Gacrux to Acrux leads to a point close to the Southern Celestial Pole.

Brian Marsden of the Central Bureau for Astronomical Telegrams noted that the comet lay only about 4 degrees from Jupiter as seen from Earth, and that while this could of course be a line of sight effect, its apparent motion in the sky suggested that it was physically close to the giant planet.

The Baron's intent to exterminate the Atreides line seems close to fruition as Duke Leto Atreides is lured to the desert planet Arrakis on the pretense of taking over the valuable melange operation there.

The slope of the tangent line is very close to the slope of the line through ( a, f ( a )) and a nearby point on the graph, for example.

A value of h close to zero gives a good approximation to the slope of the tangent line, and smaller values ( in absolute value ) of h will, in general, give better approximations.

In the first few feet of the meter, meter and stress were expected to clash, while in the final few feet they were expected to resolve and coincide — an effect that gives each line a natural " dum-ditty-dum-dum " (" shave and a haircut ") rhythm to close.