The circumference of the Earth is approximately 40,075 kilometers. Light travels at a speed of about 299,792 kilometers per second in a vacuum. Therefore, light can travel around the Earth about 7.5 times in one second.
About a second. The circumference of Earth is about 40,075 km. Light travels at about 299,792 km/s. So to find how long it takes to go around 7.5 times, we multiply the circumference of the Earth by 7.5. Then take that answer and divide it by the speed of light, which equals 1.0026 seconds.
Light travels at 300,000 km per second, or 186,000 miles per second. Multiply the speed of light in your preferred units times the time to get the distance.
The speed of light in a vacuum is approximately 186,282 miles per second (299,792 kilometers per second). This speed is considered to be the fastest possible speed in the universe according to Einstein's theory of relativity.
Well, imagine a bright beam of light joyfully hopping through space like a little firefly. In 1000 light years, that sweet light would travel a whopping distance of... 1000 light years! Just like a peaceful painter creating a masterpiece, light spread its glow far and wide in the vast universe.
The second man to travel into space was Gherman Titov, a Soviet cosmonaut who orbited the Earth multiple times aboard Vostok 2 in 1961.
light can travel around earth about seven times
Light could travel seven and a half times around the world in one second.
Light cannot travel around the Earth, since light travels at a straight line and the Earth is round. The speed of light is 300,000 kilometers per second.
Light travels at a speed of about 186,282 miles per second (299,792 kilometers per second). That means light can travel around the Earth about 7.5 times in one second! It's the fastest thing in the universe that we know of.
Light travels at 300,000 km/sec. (in a vacuum). That is enough to go 7 1/2 times around the Earth in a second (but note that light has a natural tendency to go in a straight line).
None. In the absence of an extremely strong gravitational field, like that of a black hole, light will travel in a straight line. It cannot, therefore curve around the world. In vacuum, in one second light can cover the distance equal to 7.5 times around the world.
Light travels approximately 186,282 miles per second. So, in 20 seconds, light would travel around 3,725,640 miles.
At sea level, the speed of light through air is approx 299,700,000 metres per second. The speed of sound, in similar conditions, is approx 343 metres per second. So light signals are around 875,000 times faster than sound.
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What is the speed of light? About 300,000,000 meters per second - enough to travel all around the Earth 7.5 times in one second. Can anything travel nearly as fast? - Yes, in particle accelerators particles are regularly accelerated to over 99% of the speed of light. According to current scientific understanding: (a) it is not possible to transfer matter, energy, or information faster than the speed of light. (b) An object that regularly travels at a slower speed can't be made to travel at the speed of light - it can only approach it. (A photon, that is, a speed of light, can only travel at the speed of light.)
In vacuum, the speed of light is -- 299,792,458 meters per second -- 186,282.397 miles per second. If you were to travel at the speed of light, you could go around the Earth's equator approximately 7.6 times in one second. (Flying in a typical passenger jet, at a ground speed of 500 mph, it would take 4 hours to cross the continental US.)
Light has a speed of almost 300,000 km/sec. The circumference of Earth is 40,000 km. Therefore, in theory, light can go around Earth 7.5 times per second. However, since light travels in a straight line, it will not go around the earth unless helped by being reflected from other bodies.