We bounce light off of visible parts into hidden parts and then measure the time and direction of returned light.
Has the charge of the electron or the speed of light altered over time, or has some combination of effects occurred?
Physicists have known for a long time that the speed of light is reduced when it travels though any transparent medium, such as water or glass.
However, Chopra's time at the Stadium of Light has not been a happy one, slipping down the pecking order under then-manager Roy Keane and also admitting suffering from a gambling addiction.
The problem is that here, in the northern half of India, the light fades early at this time of year and Kanpur's mixture of lingering mist and pungent smog merely exacerbated the problem.
In the Contarini Chapel the picture hangs under a real window whose light, depending on the time of day, does to the painting exactly what Caravaggio's light does within it.
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Strange business at this time of night, Nawab thought, the tail-light of the motorcycle casting a reddish glow around them on the ground.
If we fail to achieve the adoption of a second resolution we would need to consider urgently at that stage the strength of our legal case in the light of circumstances at the time.
But the best of them possess a mood, a dreamy passage of light and time, that can be captivating.
Increasingly, Mr Nacchio looks like a man racing against time to light up all of Qwest's fibres before his competitors enter the field and create a glut of bandwidth.
Its domestic monetary policy is therefore destined to remain moribund for the longest period of time while efforts to resume business as normal in light of rising commodity prices is spurring certain central banks in to a higher gear.
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Before he hobbled out of the octagon, Jones had one more spectacular title defense to finish, returning to the site of his championship win and staking his claim as perhaps the greatest UFC light heavyweight of all time.
Perhaps the idea of testifying against his former bosses at Enron seemed comparatively tame--in light of the jail time he's going to serve.
When a GPS-equipped bus approaches an intersection, it can, as before, take over the intersection's traffic light, but the computer can also calculate its expected time of arrival and decide either to extend a green light or shorten a red light.
The new microscope, called Multi-View SPIM (MuVi-SPIM) shines a thin sheet of light on the embryo, illuminating one layer of the embryo at a time to prevent light damage.
Because they are so far away, by the time their images traverse the universe at the speed of light and arrive here for Schmidt to see them, more time has passed than the Earth and the sun are old.
Every time one of these lists comes to light, it causes a scandal.
His boundless talents and accomplishments have served as a beacon of light during a time of great unrest and mistrust within baseball.
Before you get too excited, lets remember two things: one, companies file patent applications for things all the time that never see the light of day.
After all, Einstein, in his special theory of relativity, had shown that time slows down for objects moving close to the speed of light.
Here's a central truth of our time: Talent and capital flash around the world at the speed of light in search of opportunity.
As one managing director of a car components firm told me, it offers some light at a time when there's not much of it around.
"It would be hard not to call him the greatest light heavyweight of all time, " White said.
All the time I was thinking of ways of sculpting light and air.
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Knowing how that process has changed over time may shed light on the evolution of humans' superior intelligence, which relies on a long childhood.
The journalist and historian Max Hastings called Mr. Leigh Fermor 'perhaps the most brilliant conversationalist of his time, wearing his literacy light as wings, brimming over with laughter.
At a time when capital moves at the speed of light alongside job opportunities funded by capital, home ownership makes us immobile when we need to be the opposite.
Any practiced attendee of the Academy Awards will tell you that the best time to glide across the red carpet is at the end of arrivals time, when the setting sun casts a favorable light on those pesky wrinkles and unsightly bulges.
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They've set free the coolest technology from behind the locked lab doors at IBM, Xerox and the telephone companies and aft of the machine-gun-equipped guards at America's defense contractors, all of whom had reasons of their own--perfectly valid at the time--to keep the cool stuff from seeing the light of day.
"He should have made a decision at half-time or let the game finish as the light was never going to get any better at this time of the year, " said Kirk.
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