Velocity is determined through redshift by measuring the shift in wavelength of light emitted by an object. This shift is caused by the object moving either towards or away from the observer, known as the Doppler effect. The larger the redshift, the faster the object is moving.
The relationship between redshift and velocity is known as the Hubble's Law, which states that the farther away an object is from the observer, the faster it is moving. This relationship is used to determine the velocity of objects in the universe.
Redshift is measured by comparing the observed wavelength of an object's light to its known rest wavelength. The difference between the two wavelengths is then used to calculate the redshift value, which can then be used to determine the object's velocity.
No, redshift can only be used to determine the velocity of objects that are moving away from or towards the observer. Other factors, such as gravitational forces, can also affect an object's velocity and must be taken into consideration.
Yes, there are some limitations to using redshift for velocity determination. Redshift can only provide an accurate measurement of velocity for objects that are relatively close to the observer. For objects that are very far away, the effects of the universe's expansion and other factors can distort the redshift value, making it less reliable for determining velocity.