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# Ben is racing a light beam in a 100-meter dash. Ben bursts out of the starting blocks at 99 percent of the spe?

Ben is racing a light beam in a 100-meter dash. Ben bursts out of the starting blocks at 99 percent of the speed of light (0.99c). At the same instant, a flashlight beam is turned on from the starting blocks.

Refer to the race described above. According to the spectators watching in the stands, what happens?

A. The light beam wins the race by a large margin because it is going faster than Ben by the full speed of light.

B.The light beam instantly finishes the race, before Ben even has a chance to start.

C.The light beam wins the race, but barely — it is going 1 percent of the speed of light faster than Ben.

D.Ben beats the light beam to the finish line, becoming a hero.

Update:

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• Jared
Lv 7

The answer is C, because in the spectators frame the sprinter is going .99c and light is traveling @ 1.00c:

However in the frame of the runner, the light it STILL traveling @ 1c, the runner will say that the light beat him by a considerable margin. Also, this raises a topic of great confusion in Relativity and that is the idea of simultaneity...in Relativity there is NO SUCH THING as simultaneous events

• sovak
Lv 4
3 years ago

circulate 'C' Off - mild isn't 'on the spot'. the two 'A' And 'B' look possible, yet I BEleive the respond is 'B'. As They the two initiate off on an identical 2d, the sunshine Beam Is Already Going swifter Than Ben, So It would not 'progressively' Come forward, It Already starts off forward. So Then It must be B.