Every action has an equal and opposite reaction.

To decelerate the aircraft, the forward thrust of the aircraft which propels the aircraft forward is reversed by a Thrust Reverser. This is accomplished by redirecting all the air ( in small engines ) or partially ( in larger engines ) to the front.  

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Due to the flow of air to the front end of the aircraft, a reaction force acts in the opposite direction to the motion of the aircraft. This aids in the deceleration of the aircraft.

Vegas Baby!

If you have ever been to Vegas and have seen to the Luxor Sky Beam, then you have witnessed one of modern day physics marvels. If you have plans on going to Vegas this summer, don’t miss it. 

At 42.3 billion candela, the Luxor Sky Beam is the strongest beam of light in the world. Using computer designed, curved mirrors to collect the light from 39 xenon lamps and focus them into one intense, narrow beam. 

On a clear night, the Sky Beam is visible up to 275 miles (443 km) away by aircraft at cruising altitude, such as over Los Angeles.

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Each of the 39 lamps is a 7,000 watt Xenotech fixture costing about $1,200. When at full power, the system costs $51 an hour to operate, with $20 per hour of that just for its 315,000 watts of electricity.

The beam has operated reliably since first enabled on October 15, 1993, and is an FAA designated navigational landmark for aviators.

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The lamp room is about 50 feet (15 m) below the top of the building and serviced by a staff of two workers during the day.The room’s temperature is about 300 °F (149 °C) while the lights are operating. 

Since 2008, only half the lamps are lit as a cost and energy saving measure. The light might be the world’s best bug attractor, establishing a new ecosystem of moths, bats, and owls.

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Fun Fact.

Strobe Lights are used before the beam starts in order to warn the helicopters and other planes in the vicinity. The beam has the potency to temporarily blind pilots and the strobe lights effectively avoid this catastrophe.