When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer.

When light is sent through the sample, it is backscattered by the particles / droplets.

When particles in a beam are thrown against a foil made of a certain substance, the cross section is a hypothetical area measure around the target particles of the substance ( usually its atoms ) that represents a surface.

When considered as particles, they are known as photons, and each has an energy related to the frequency of the wave given by Planck's relation E

When electromagnetic radiation is incident on matter, it causes the charged particles to oscillate and gain energy.

When these particles collide with nucleons in the Earth's atmosphere, a shower of particles is generated, including pions.

When matter ( ordinary material particles ) is changed into energy ( such as energy of motion, or into radiation ), the mass of the system does not change through the transformation process.

When energy is in a form other than thermal energy, it may be transformed with good or even perfect efficiency, to any other type of energy, including electricity or production of new particles of matter.

When calculating scattering cross sections in particle physics, the interaction between particles can be described by starting from a free field which describes the incoming and outgoing particles, and including an interaction Hamiltonian to describe how the particles deflect one another.

When the intermediate states at intermediate times are energy eigenstates ( collections of particles with a definite momentum ) the series is called old-fashioned perturbation theory.

When a group of incoming particles are to scatter off each other, the process can be thought of as one where the particles travel over all possible paths, including paths that go backward in time.

When we perform the experiment, the probability of obtaining two particles in the state is now 0. 33 ; the probability of obtaining two particles in the state is 0. 33 ; and the probability of obtaining one particle in the state and the other in the state is 0. 33.

When the number of particles in one excited state exceeds the number of particles in some lower-energy state, population inversion is achieved and the amount of stimulated emission due to light that passes through is larger than the amount of absorption.

When they encounter an infection site the particles gain a positive charge provoked by the slightly acidic environment at the infection sites, allowing them to bind to the negatively charged bacterial cell walls and release antibiotics at locally high concentration.

When considering light's particle-like properties, the light is modelled as a collection of particles called " photons ".

When subjected to an electromagnetic field the paramagnetic particles change spacing, modifying their color and reflective properties.

When these viral episomes initiate lytic replication to generate multiple virus particles, they in general activate cellular innate immunity defense mechanisms that kill the host cell.

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When aircraft are no longer helpless on airfields, they are no longer vulnerable to Aj.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??

When tire size is measured in this manner a constant of 168 is used in the formula.

When speed is being measured, the instruction set matters.

( When measured in decibels it is logarithmically related to the power ratio: G ( dB )= 10 log ( P < sub > out </ sub > /( P < sub > in </ sub >)).

When Yellowstone Caldera last erupted some 650, 000 years ago, it released about 1, 000 km < sup > 3 </ sup > of material ( as measured in dense rock equivalent ( DRE )), covering a substantial part of North America in up to two metres of debris.

When the myelin sheath is damaged, nerve signals are slower, and this can be measured by a common neurological test, electromyography.

When one quantity was measured, and became determined, the conjugated quantity became indeterminate.

When S < sub > z </ sub > is measured, the system state ψ collapses into an eigenvector of S < sub > z </ sub >.

When renal function, measured by glomerular filtration rate, is persistently poor, dialysis and kidney transplantation may be treatment options.

When the measured pressure is rapidly pulsing, such as when the gauge is near a reciprocating pump, an orifice restriction in the connecting pipe is frequently used to avoid unnecessary wear on the gears and provide an average reading ; when the whole gauge is subject to mechanical vibration, the entire case including the pointer and indicator card can be filled with an oil or glycerin.

When the system is used for physical three-space, it is customary to use positive sign for azimuth angles that are measured in the counter-clockwise sense from the reference direction on the reference plane, as seen from the zenith side of the plane.

When the net force on the system is zero, the torque measured from any point in space is the same.

When measured as a function of mean solar time rather than uniform time, the effect appears as a positive acceleration.

When the endpoint of the reaction is reached, the volume of reactant consumed is measured and used to calculate the concentration of analyte by

When Reed Richards measured the residual power levels left behind when Champion abducted Thing, he declared he was on a higher level than Galactus.

When the radius of Vega was measured to high accuracy with an interferometer, it resulted in an unexpectedly large estimated value of times the radius of the Sun.

When measured to the top of its antenna masts, it stands at.

When used for measuring voltage, the input impedance of the multimeter must be very high compared to the impedance of the circuit being measured ; otherwise circuit operation may be changed, and the reading will also be inaccurate.

When a beam is measured with a laser beam profiler, the wings of the beam profile influence the D4σ value more than the center of the profile since the wings are weighted by the square of its distance, x < sup > 2 </ sup >, from the center of the beam.

When the image rejection ratio is measured, the input signal levels of the desired and image frequencies must be equal for the measurement to be meaningful.

When this impulse hits the surface of the medium to be measured, part of the impulse reflects back up the wave guide.

When not qualified, the term " luminosity " means bolometric luminosity, which is measured either in the SI units, watts, or in terms of solar luminosities.

When risk is measured by deaths per passenger kilometer, air travel is approximately 10 times safer than travel by bus or rail.

When actual measurements of an antenna's gain are made by a laboratory, the field strength of the test antenna is measured when supplied with, say, 1 watt of transmitter power, at a certain distance.

When measured at the Low Water Datum, the lake contains a volume of 850 cubic miles ( 3, 540 km < sup > 3 </ sup >) and a shoreline length ( including islands ) of 3, 827 miles ( 6, 157 km ).