Oral Roberts's successful use of television as a medium to gain a wider audience led others to follow suit.

The back-formed verb to lase is frequently used in the field, meaning " to produce laser light ," especially in reference to the gain medium of a laser ; when a laser is operating it is said to be " lasing.

A laser consists of a gain medium, a mechanism to supply energy to it, and something to provide optical feedback.

The gain medium is a material with properties that allow it to amplify light by stimulated emission.

Light of a specific wavelength that passes through the gain medium is amplified ( increases in power ).

For the gain medium to amplify light, it needs to be supplied with energy.

The most common type of laser uses feedback from an optical cavity — a pair of mirrors on either end of the gain medium.

Light bounces back and forth between the mirrors, passing through the gain medium and being amplified each time.

This glowing plasma is excited and then acts as the active laser medium | gain medium through which the internal beam passes, as it is reflected between the two mirrors.

The gain medium is excited by an external source of energy into an excited state.

The gain medium of a laser is normally a material of controlled purity, size, concentration, and shape, which amplifies the beam by the process of stimulated emission described above.

The gain medium absorbs pump energy, which raises some electrons into higher-energy (" excited ") quantum states.

In a few situations it is possible to obtain lasing with only a single pass of EM radiation through the gain medium, and this produces a laser beam without any need for a resonant or reflective cavity ( see for example nitrogen laser ).

The resonator typically consists of two mirrors between which a coherent beam of light travels in both directions, reflecting back on itself so that an average photon will pass through the gain medium repeatedly before it is emitted from the output aperture or lost to diffraction or absorption.

If the gain ( amplification ) in the medium is larger than the resonator losses, then the power of the recirculating light can rise exponentially.

But each stimulated emission event returns an atom from its excited state to the ground state, reducing the gain of the medium.

With increasing beam power the net gain ( gain minus loss ) reduces to unity and the gain medium is said to be saturated.

For continuous wave operation it is required for the population inversion of the gain medium to be continually replenished by a steady pump source.

The lasing medium in some dye lasers and vibronic solid-state lasers produces optical gain over a wide bandwidth, making a laser possible which can thus generate pulses of light as short as a few femtoseconds ( 10 < sup >− 15 </ sup > s ).

In a Q-switched laser, the population inversion is allowed to build up by introducing loss inside the resonator which exceeds the gain of the medium ; this can also be described as a reduction of the quality factor or ' Q ' of the cavity.

And most of the gain will be in self-unloading vehicles ''.

As the historic processes of modernization gradually gain momentum, their cohesion will be threatened by divisive forces, the gaps between rulers and subjects, town and country, will widen ; ;

It is felt that fiber-coupled double- ( and multi- ) stage image intensifiers will gain considerable importance in the future.

To gain such authorisations, the pilots will have to demonstrate to an examiner that they can perform to those limits without endangering themselves, ground crew or spectators.

RF amplifiers are often specified in terms of the maximum power gain obtainable, while the voltage gain of audio amplifiers and instrumentation amplifiers will be more often specified ( since the amplifier's input impedance will often be much higher than the source impedance, and the load impedance higher than the amplifier's output impedance ).

For example, an audio amplifier with a gain given as 20 dB will have a voltage gain of ten ( but a power gain of 100 would only occur in the event the input and output impedances were identical ).

The gain of a good quality full-range audio amplifier will be essentially flat between 20 Hz to about 20 kHz ( the range of normal human hearing ).

Both pairs will try to gain and maintain the attack, smashing downwards when possible.

If a pair cannot hit downwards, they will use flat strokes in an attempt to gain the attack.

This interrupt ensures that the scheduler will gain control to perform a context switch.

Let it go beyond a certain point, and it will tend for a time to gain strength from its own development as its effects spread and return to intensify the process of collapse ”.

Prior to working on an image, the artist will likely want to gain an understanding of how the various media will work.

Therefore unless we can gain insight into that truth, and understand what is really able to provide lasting happiness, and what is unable to provide happiness, the experience of dissatisfaction will persist.

In many cases, with input and output in the same units, gain will be unitless ( although often expressed in decibels ); for others this is not necessarily so.

If the gain is not constant, e. g., by clipping the output signal at the limits of its capabilities, the output signal will be distorted.

The rules do not allow the person who kicked the ball to gain advantage from the kick, so the ball will automatically be passed on to the opposing team.

" It looks to me that with this ribbon as though I will gain no fame from it if I do tear apart such a slender band, but if it is made with art and trickery, then even if it does look thin, this band is not going on my legs.

To gain additional points, teams will sometimes rotate and / or move lifts across the ice.

Thus such a gain medium must have a gain bandwidth sufficiently broad to amplify those frequencies.

Doped fiber amplifiers ( DFAs ) are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal.

wavelength-division multiplexed communications systems as a single amplifier can be utilized to amplify all signals being carried on a fiber and whose wavelengths fall within the gain window.

* gain to amplify signal strength in low-light conditions ;

Typically, the gain value and the peak value are then stored as metadata in the audio file, allowing ReplayGain-capable audio players to automatically attenuate or amplify the signal on a per track or per album basis such that tracks or albums play at a similar loudness level.

The input offset voltage of amplifiers becomes important when trying to amplify small signals with very high gain.