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Basically parallax, parallel axis, is the angle between two lines of sight. When you focus two eyes on something, your eyes are each looking slightly away from straight ahead. That is the parallax angle. So the farther away something is, the less the parallax angle. It is used in astronomy when a distant object is sighted and then sighted again half a year apart, we know that the earth has moved 2 AU in space, on the opposite side of the sun, and the angle from a fixed reference will provide a parallax angle which can then be used to relate the distance by trigonometry.
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∙ 13y ago
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∙ 11y agoBecause the area that the light illuminate gets wider the further it is from the source, the wider that area the dimmer the light will seem because it is still the same amount of light but in a bigger area
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∙ 13y agothe shorter the distance , the brighter the light
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∙ 13y agoGravity is a very tricky thing but yes it does affect light. If path of light happens to pass by a VERY big planet the planets strong gravitational field will redirect the path of light.
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∙ 13y agoIt's how we measure how far away the stars and other planets are in space. Without it we would have to measure the distance in miles.
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∙ 8y agoLight travels at a constant speed. Therefore the farther away a star is, the longer it takes for light to reach us.
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∙ 13y agocoz they are..... they just are.....
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What is the unit of length equal to the distance light travels in one year?
The distance light would travel in one year in a perfect vacuum is a light year. It's a subtle distinction, but an important one.
who can anser me The distance light travels in a year is called?
The distance light travels in a year is called light-year
Why is a light year a unit of distance?
A light year is the distance light travels in one year. Very roughly 6 trillion miles. When measuring distances it is important to choose a unit suitable for the distance being measured. For instance you would not measure the distance between two cities in inches you would choose miles or kilometres. Because of the truly huge distances involved when measuring astronomical objects large units were needed. So the light year is used, among other things.
What is a light-minute?
A light-minute is the distance light travels in a vacuum in one minute's time. The distance of a light-minute is 11,176,943.8 miles or 17,987,547.5 km
Is the average distance from earth to the sun a light-year?
No. The distance from the Earth to the Sun is 8 light-minutes.It takes light 8 minutes to travel from the Sun to the Earth, in other words.The distance that light can travel in one year is one light-year.
What is the unit of length equal to the distance light travels in one year?
The distance light would travel in one year in a perfect vacuum is a light year. It's a subtle distinction, but an important one.
What are light-minutes in science?
A light-minute is a measure of distance. It is the distance light travels in one minute's time. One light-minute is a distance of about 11,176,943.82 miles.
Is the sun measured in light years?
'Light-year' is a unit of a distance. It is the distance for light to travel one year. So it is a great distance.
How is a light year used as a distance unit?
A light year is the distance that light (travelling at approximately 300,000 km/second in a vacuum) goes in one year. It's about 9.46 trillion kilometers. The light year is a convenient unit for distance in outer space because stars are extremely far apart in relation to any measurement on our planet. For example, the nearest star other than our sun is about 4.34 light years, or about 41,000,000,000,000 kilometers. It is important to remember that a light year is not a unit of time. It is a unit of distance.
Why is light important to learning about space?
Light is a measurable medium which passes through space. It can further be broken into different components and they can be used to calculate distance, velocity, frequencies etc. It can be used to determine size of planets, galaxies and their distance from us.
The light travels from Alpha Centauri to Earth in?
The distance has been generally presented in Light-years, which is the distance light travels in one-year. The distance to Alpha Centari is 4.7 light-years (alpha Centari is 4.3 light-years distance).
What is the distance travelled by light in one day?
1 light day is a distance.
What is the distance for a light-year?
A light year is the distance light travels in one year and is a measure of distance or length. It equates to about 5.9 trillion miles.
How many second in a light year?
A light year is a measure of distance, not time. A light year is the distance that light will travel in one year. One light second is 186,000 miles. A light year is a measure of distance, not time. A light year is the distance that light will travel in one year. One light second is 186,000 miles.
who can anser me The distance light travels in a year is called?
The distance light travels in a year is called light-year
Why is light measured in distance and not in time?
-- The distance that light travels in some amount of time is expressed in units of distance. -- The time that it takes light to cover some amount of distance is expressed in units of time. -- The speed of light is expressed in units of speed . . . distance/time
What is the distance used to calculate light-years?
Light-year is the distance in this case. It is the distance light travels in a year, and is equal to about 9.5 x 1012 kilometers.
