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As light travels, its wavelength can lengthen or shorten causing it to appear more red the further it travels or more blue if it has traveled a shorter distance. This effect, combined with various chemical spectral identifiers, can be used to determine the distance the light has traveled, giving a rough estimate to the location of its source.
changes in wavelength is called redshift(when wavelength is increased) and blueshift(when decreased). redshifts and blueshifts are attributable to the Doppler effect
What else can I help you with?
What is a refraction why does it happen?
Refraction is the bending of light as it travels from one medium to another with a different density, such as from air to water. This change in speed causes the light waves to change direction. Refraction happens because light travels at different speeds in different mediums, leading to a change in the angle of the light wave.
What travels faster than light?
Nothing travels faster than light.
The light from Polaris travels through space in what form of energy?
Light travels as light energy. Light is a type of electromagnetic wave.
Light travels in sraight lines that we call?
Light travels in straight lines that we call rays.
How fast light travels in kilometers?
Light travels at 299,792.211 km per second in a vacuum.
Where light travels?
light travels in ____________ which are called_
Explanation on how fast light travels?
light travels very fast! it travels in the form of waves.
Why does lightning appear first before thunder when they both happen at once?
Light travels much faster than sound.
A girl sees a fire work expload before she hears the bang.why does this happen?
Light travels faster than sound
What is a refraction why does it happen?
Refraction is the bending of light as it travels from one medium to another with a different density, such as from air to water. This change in speed causes the light waves to change direction. Refraction happens because light travels at different speeds in different mediums, leading to a change in the angle of the light wave.
Which travels fastest sound water air light?
Light travels faster.
What travels faster than light?
Nothing travels faster than light.
The light from Polaris travels through space in the form of?
Light travels as light energy. Light is a type of electromagnetic wave.
Why is it important to explain the speed of light together with the medium in which the light travels?
The speed of light is dependent on the medium it travels through. Light travels fastest in a vacuum than in water or air.
How far does light travels?
Light travels an infinite distance until it is absorbed by an object.
Light travels fastest in what?
Light travels at 299792458 meters per second in a vacuum.
How do they measure galaxys?
In light years (how far light travels in a year) light travels at about a billion km/hr.
