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When light waves are stretched by an object moving away from us?
Wiki User
∙ 11y ago
Doppler effect
Red Shift
Wiki User
∙ 11y ago
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Stars moving away from the earth show a red shift Why?
The star is moving away from us. Therefore, the Doppler effect must be considered. The Doppler effect is waves (in this case light) will be compressed in front of a moving object and stretched behind the object. This stretching creates a long wavelength. Red light has a long wavelength (the longest of visible light), so we call this stretching red shift.
What does redshifts indicate to astronomers?
The object is moving away from the observer.
What does a blue shift of the light from a star indicate?
When light shifts toward the blue end of the spectrum, it is shifting in the direction of shorter wavelengths. This happens when a luminous object, such as a star, is moving toward you. This motion tends to compress the waves which it emits. Stars that are moving away from the observer will instead exhibit a red shift. The waves are stretching out, because of the motion. And because the universe is expanding, red shifts are by far the most common.
What does a blue shift of light from a star indicate?
When light shifts toward the blue end of the spectrum, it is shifting in the direction of shorter wavelengths. This happens when a luminous object, such as a star, is moving toward you. This motion tends to compress the waves which it emits. Stars that are moving away from the observer will instead exhibit a red shift. The waves are stretching out, because of the motion. And because the universe is expanding, red shifts are by far the most common.
What is blue shift?
Blue shift is a phenomenon whereby a moving object emits light in such a way that the waves of light actually posses a higher frequency than when emitted. Its like a pitcher throwing a fastball versus the same pitcher throwing a fastball from a moving vehicle; to an observer on the side of the road, the ball has a higher velocity when being thrown from the vehicle than from a stationary pitcher. The higher frequency of the light results in a shift towards the blue-end of the visible light spectrum; hence the name blue shift. This is a method used in astronomy to determine that a visible object is moving towards the Earth.
Stars moving away from the earth show a red shift Why?
The star is moving away from us. Therefore, the Doppler effect must be considered. The Doppler effect is waves (in this case light) will be compressed in front of a moving object and stretched behind the object. This stretching creates a long wavelength. Red light has a long wavelength (the longest of visible light), so we call this stretching red shift.
What does the blue shift mean in regard to stars and galaxies?
Light is a spectrum. On one end it is red and the other blue. We see light in this spectrum as waves and if it is blue, the object is coming toward us. If the waves are red than it is moving away. The frequency of these waves tell us how fast and object is moving toward or away from us.
What does the term blue shift refer to?
It refers to an increase in frequency (and decrease in wavelength) of light or other electromagnetic waves, if the object that emits the waves is moving towards us. The opposite is REDSHIFT, which happens when the object moves away from us.
How is the Doppler effect related to star?
Stars moving toward our solar system display blue shift as the light waves are compressed because their motion relative to us is a positive vector. Stars moving away from us create red shift, as the waves are stretched. This is similar to the Doppler Effect in sound waves.
Moving light waves are called what kind of waves?
Electromagnetic waves. Otherwise known as light radiation.
What is it called when light waves do not bounce off an object?
Absorption; the light is absorbed by the object.
What happens to light when its strikes an object?
The light waves can be reflected, absorbed, they can pass the object or be refracted.,
Is light an object of matter?
No, light is energy in electromagnetic waves, it is not matter.
The scattering of light waves from an object is called?
Dispersion.
What are the three things that can happen when light wave stikes an object?
it causes gamma waves ,visible light ,radio waves.
Bending of light waves when they pass through another substance?
this occurs when an object takes in light waves
When light encounters a material it can build up vibrations in the electrons of certain atoms that may be intense enough to last over a long period of time. Will the energy of these vibrations tend...?
When a light wave hits an object, what happens to it depends on the energy of the light wave. The waves can be reflected or scattered off the object; waves can be absorbed by the object; waves can be refracted through the object; waves can pass through the object with no effect.
