When moving from a denser medium into a less dense one ( i. e., n < sub > 1 </ sub > > n < sub > 2 </ sub >), above an incidence angle known as the critical angle, all light is reflected and R < sub > s </ sub > = R < sub > p </ sub > = 1.

When the modulation rate is on time scales much slower than the cavity lifetime and the time period over which energy can be stored in the lasing medium or pumping mechanism, then it is still classified as a " modulated " or " pulsed " continuous wave laser.

When a beam of light crosses the boundary between a vacuum and another medium, or between two different media, the wavelength of the light changes, but the frequency remains constant.

When a protostar is formed from the collapse of a giant molecular cloud of gas and dust in the local interstellar medium, the initial composition is homogeneous throughout, consisting of about 70 % hydrogen, 28 % helium and trace amounts of other elements, by mass.

When you see him, recognise him: a man of medium height, reddish hair, wearing two light yellow garments, looking as if drops were falling down from his head though it will not be wet.

When fluid flows are not in equilibrium, local pressures may be higher or lower than the average pressure in a medium.

When light of the appropriate frequency passes through the inverted medium, the photons stimulate the excited atoms to emit additional photons of the same frequency, phase, and direction, resulting in an amplification of the input intensity.

When wavelengths of electromagnetic radiation are quoted, the wavelength in vacuum usually is intended unless the wavelength is specifically identified as the wavelength in some other medium.

When a medium is nonlinear, the response to complex waves cannot be determined from a sine-wave decomposition.

When the supernova remnant slows to the speed of the random velocities in the surrounding medium, after roughly 30, 000 years, it will merge into the general turbulent flow, contributing its remaining kinetic energy to the turbulence.

When a light ray is incident from a medium of refractive index n to the core of index n < sub > core </ sub > at the maximum acceptance angle, Snell's law at the medium – core interface gives

When using medium to high frequency radio telecommunication, there are radio waves which travel both parallel to the ground, and towards the ionosphere, referred to as a ground wave and sky wave, respectively.

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

When placed in appropriate medium, under appropriate conditions, they were able to be reactivated.

When light travels from a medium with a higher refractive index to one with a lower refractive index, Snell's law seems to require in some cases ( whenever the angle of incidence is large enough ) that the sine of the angle of refraction be greater than one.

When data is formatted into packets, the bitrate of the communication medium can be better shared among users than if the network were circuit switched.

; 1-persistent: When the sender ( station ) is ready to transmit data, it checks if the transmission medium is busy.

When the sender is ready to send data, it checks continually if the medium is busy.

When a bitstream is captured and stored in a computer storage medium, a computer file is created.

When circularly polarized light passes through an absorbing optically active medium, the speeds between right and left polarizations differ ( c < sub > L </ sub > c < sub > R </ sub >) as well as their wavelength (< sub > L </ sub >< sub > R </ sub >) and the extent to which they are absorbed (< sub > L </ sub >< sub > R </ sub >).

When the medium through which the light or radio waves travel is disturbed, the light image or radio information is distorted and can become unrecognizable.

When a parallel-plate capacitor is filled with a dielectric, the measurement of dielectric properties of the medium is based upon the relation:

When devices attempt to use a medium simultaneously, frame collisions occur.

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

When alienation is used as an objective and diagnostic category, for example, it becomes clear that Fromm would have to say that awareness of alienation goes far toward conquering it.

When a plan burst its seams, hasty conferences supply the necessary patch, and life goes merrily on.

: When Ivo goes back with the urn, the urn ;

When working under cover, he frequently goes by the alias Chuck Finley.

When a game goes to overtime, each team is given one possession from its opponent's twenty-five yard line with no game clock, despite the one timeout per period and use of play clock.

When the axes are drawn according to the mathematical custom, the numbering goes counter-clockwise starting from the upper right (" northeast ") quadrant.

When he was building his first tiny cell, as his hagiograph goes, his first disciple and monk was a boar that had been rendered gentle by God.

When the plasma goes upward from the footpoints towards the loop top, as it always occurs during the initial phase of a compact flare, it is defined as chromospheric evaporation.

When Robespierre went to the guillotine in July of that year the crowd jeered, " There goes the dirty maximum!

" About Nelson Mandela he said, " When Mandela goes it will be a moment when all South Africans put away their political differences, will take hands, and will together honour maybe the biggest South African that has ever lived.

) When he does get a date, it usually goes awry ; Jon's dates have slashed his tires, been tranquilized, and called the police when he stuck carrots in his ears.

When John Doe goes into a bank to make a withdrawal, he tells the bank teller he is John Doe ( a claim of identity ).

When Servetus mentioned that he would come to Geneva if Calvin agreed, Calvin wrote a letter to Farel on 13 February 1546 noting that if Servetus were to come, he would not assure him safe conduct: " for if he came, as far as my authority goes, I would not let him leave alive.

When the Lead goes forward, the Follow will naturally go backwards.

When a program comprises multiple object files, the linker combines these files into a unified executable program, resolving the symbols as it goes along.

When Niviane finally goes back to her country, Merlin escorts her, accompanied by his trusty assistant Natalie Nissim.

When we repeat an experiment, as the saying goes, we really perform another experiment with a ( more or less ) similar set of generating conditions.

When one of the nodes involved goes down, those nodes which used it as their next hop for certain destinations discard those entries, and create new routing-table information.

An old saying goes, " The first time you think of reducing sail you should ," and correspondingly, " When you think you are ready to take out a reef, have a cup of tea first.

When Louise goes below deck momentarily, a large, strange cloud on the horizon passes over the craft, leaving a reflective mist on Scott's bare skin.

When the police came to investigate, they find nothing and the narrator goes free.

When the day arrives Mary leaves Penny to coordinate the Donolly wedding before she goes to the town hall to marry Massimo.

When Ruth returns to Sheffield, she goes first to the Kemps ' house and finds Mrs. Kemp's body in their shelter.

When a couple views marriage as the next step and goes for it without reevaluating the relationship and making sure they are getting married for the right reasons, or because they have put so much time and resources into it already and it would be harder to break up, then the marriage will most likely not be successful.