If there are too much of these greenhouse gases, sunlight heats the Earth's surface, but the gases block the infrared radiation from exiting back to space.

If a BGA is found to be badly soldered, it can be removed in a rework station, which is a jig fitted with infrared lamp ( or hot air ), a thermocouple and a vacuum device for lifting the package.

If N < sub > f </ sub > is close to the value at which asymptotic freedom is lost, the resultant infrared fixed point is weak, of parametric order, and reliably accessible in perturbation theory.

If the fluorophore absorbs two infrared photons simultaneously, it will absorb enough energy to be raised into the excited state.

If an actual energy weapon were to be constructed ( such as a powerful CO < sub > 2 </ sub > Laser ) which projected a beam of infrared light, it should appear much like the Heat-Ray, without any visible " energy bolts ".

If we take N = 1 chiral super QCD with N < sub > c </ sub > colors and N < sub > f </ sub > flavors with, then by the Seiberg duality, this theory is dual to a nonabelian gauge theory which is trivial ( i. e. free ) in the infrared limit.

If he / she chooses not to put the detectors there, then the interference pattern will become reality ; if he / she does put the detectors there, then the beam path will become reality.

If the resolving time of the detectors is less than 500 picoseconds rather than about 10 nanoseconds, it is possible to localize the event to a segment of a chord, whose length is determined by the detector timing resolution.

If there are two detectors, one for each beam, then direction can also be known.

If their main purpose is radiation measurement, they are called radiation detectors, but as photons are also ( massless ) particles, the term particle detector is still correct.

If a sample is placed in the path of the sample beam, the intensities of the beams entering the two detectors will change, allowing the calculation of the phase shift caused by the sample.

If we had other sense organs altogether, like infra-red detectors or echo-location devices, we can barely imagine how things would appear to us.

If you were a man '' --

If she, Pamela, were being held responsible for his crimes, then hers must be the final act of expiation.

If someone were to drop a match in here, this place would go up like a haystack ''.

If the other pilots were worried, they did not show it.

If it were the enemy, tactically his position was correct.

If it were not for an old professor who made me read the classics I would have been stymied on what to do, and now I understand why they are classics ; ;

If it were not that I knew who it was I could have mistaken it for my Aunt so well did her clothes fit him.

If an automobile were approaching him, he would know what was required of him, even though he might not be able to act quickly enough.

If there were only darkness, all would be clear.

If there were only the mess, all would be clear ; ;

If these people were denied a voice ( do they have a moral right to a voice??

If we were creating a wholly new society, we could insist that our social, political, economic and philosophic institutions foster rather than hamper man ; ;

If living Jews were unavailable for study, the Bible was at hand.

If his scholarship and formal musicianship were not all they might have been, Mercer demonstrated at an early age that he was gifted with a remarkable ear for rhythm and dialect.

If she were not at home, Mama would see to it that a fresh white rose was there.

If the Stearns were not there, grace would be omitted.

If anything, the conservative Democrats were more opposed to Hearst than the Republicans.

If the hardships of the winter at Valley Forge were trying for healthy men, they were, of course, much more so for those not in good health.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If there were no West Berlin problem, imperialist quarters would have invented an excuse for stepping up the armaments race to try to solve the internal and external problems besetting the United States and its NATO partners.

If the new Soviet series has followed the general pattern of previous Russian tests, the shots were roughly half fission and half fusion, meaning a fission yield of 30 to 40 megatons thus far.

If the Hessian troops sent here willy-nilly by the Hessian Government to fight for England in the 1770's were mercenaries, what shall we call the UN troops sent to the Congo willy-nilly by their governments to fight for the United Nations??

If the UN troops are not mercenaries then the Hessians were not mercenaries either.

If he were to go with White, he would be out there two days, not just listening in the dark at some point between here and Papa-san, but moving ever deeper into enemy land -- behind Papa-san -- itself.

If this must be done, they should always be corked and kept in a cool place ; ;

I kept saying, `` If I could just build up a reputation for myself, make some real money, get to be well known as an illustrator -- like Peter Askington, for instance -- then I could take some time off and paint ''.

If she'd kept on as she'd been going, the story I'd told Gladdy would probably have been true by now, anyhow

If Hōkūleʻa could be kept directly overhead, they landed on the southeastern shores of the Big Island of Hawaiʻi.

If the soldier should die, one side is removed and kept for the army's official records, while the other side is left attached to the body.

If these were the outcomes of reform, he was thankful that he had kept out of it.

If un-aerated, the solution level is kept low enough that enough roots are above the solution so they get adequate oxygen.

If by then two physicians, or one physician and one psychologist then decide that the patient meets the Maryland criteria for an involuntary psychiatric admission, then he or she may be kept inpatient involuntarily for up to ten days.

If there were no holes then a loop of rope kept the oars in place.

If the material is kept still there is often nothing ( such a physical vibration ) to trigger this change, and supercooling ( or superheating ) may occur.

If a marriage agreement was made in 1059, however, it was not kept, and this may explain the Scots invasion of Northumbria in 1061 when Lindisfarne was plundered.

If the key is truly random, as large as or greater than the plaintext, never reused in whole or part, and kept secret, the ciphertext will be impossible to decrypt or break without knowing the key.

If water-saturated zones still exist in sediments under the volcano, they would likely have been kept warm by a high geothermal gradient and residual heat from the volcano's magma chamber.

If kept in too warm a temperature, both mature and new potatoes will sprout and shrivel.

If the workman lost, I would pay his regular wages ; if he made more than the wages, he kept it.

If a wrestler has secured a rope break from a submission hold, and the offending wrestler does not break the hold on the count of five, causing the offending wrestler to lose automatically, it is still considered a disqualification ( which is kept distinct from countouts in most major promotions ), even though the automatic loss was procured through counting.

If the drain is opened and the tumbler is kept in position over the hole, the water in the tumbler drains out leaving the glass filled with air, and this then acts as the plug.

If the droplets become too large and heavy to be kept aloft by the air circulation, they will fall from the cloud as rain.

# If temperature and pressure are kept constant, then the volume of the gas is directly proportional to the number of molecules of gas.

# If the temperature changes and the number of gas molecules are kept constant, then either pressure or volume ( or both ) will change in direct proportion to the temperature.

If a holder would sell, the family kept the right of redemption, and there seems to have been no time limit to its exercise.

If the tenant paid his rent and kept the land in good tilth, the landlord could not interfere nor forbid subletting.

If the husband could show that his wife had been a bad wife, the Code allowed him to send her away, while he kept the children as well as her dowry ; or he could degrade her to the position of a slave in his own house, where she would have food and clothing.

If it came to the sudden-death tie-breaker, only the final question ( the one that ultimately broke the tie ) was kept and aired.