If I shine a flashlight into they sky, would it travel forever, unless the beam of light hits a celestial object?
I ask this because astronomers have seen light from 13 billion years ago that has reached earth. Does that mean that on the path that this light took, there were no objects to impede it's travel to earth?
2006-10-14 22:57:12 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Yes the light would travel until it hits an atom or molecule it gets absorbed. The light from your flashlight contains so few photons( light particles) compared with stars that most of the light would be absorbed by particles in the atmosphere.
The light that comes from 13,000 million light years away may only be a few hundred to a few thousand photons that actually fall onto a sensor in a telescope at a particular time
The photons may have been on curved path on its way. Their path being bent by moving near a massive object like a pulsar.
2006-10-14 23:12:39 · answer #1 · answered by cehelp 5 · 1⤊ 0⤋
actually you are right but as you know heavenly bodies moves except maybe for stars but they still "moves" so even though a celestial object impedes the travel of light this is only temporary because once it moves out of the path then the light resumes its beam.
2006-10-14 23:01:54 · answer #2 · answered by Dave B 5 · 0⤊ 0⤋
Electromagnetic energy comes in different forms because of the varying wavelengths of each wave. Some of these waves we can see, some we can feel, and others can be extremely harmful. Below is a chart of electromagnetic energy and its various forms.
Cosmic rays Background radiation; particles of enormous energy given off by stars.
Gamma radiation Deadly high energy given out by the sun and other stars.
X rays High energy used in X ray equipment.
Ultraviolet rays Invisible energy waves in sunlight, which cause skin to tan.
Visible light Basic colors of light, emitted by the sun and visible to the human eye. ROYGBIV.
Infrared rays Rays of heat energy; sensed by our nervous system.
Radio waves Microwaves; TV; radio energy
2006-10-15 02:30:31 · answer #3 · answered by veerabhadrasarma m 7 · 0⤊ 0⤋
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2016-07-11 09:21:54 · answer #4 · answered by Allen 3 · 0⤊ 0⤋
yes, if there's no matter present in the atmosphere such as dust, air, plasma etc. but unfotunately there is, so it won't.
2006-10-14 23:13:07 · answer #5 · answered by Anonymous · 1⤊ 0⤋
Yes it's possible!!!!!!!!!!!
2006-10-15 02:14:53 · answer #6 · answered by jeff g 4 · 0⤊ 0⤋