When a vibrating object is moving towards an observer, the measured frequency of the vibrations will be higher than the actual rate of vibration of the object. This phenomenon is known as the Doppler effect, where the motion of the source of waves (in this case, vibrations) affects the observed frequency of the waves.
In the case of a star moving towards an observer on Earth, the same principle applies. The light emitted by the star will have its wavelength compressed due to the relative motion between the star and the observer. This compression of wavelengths causes a shift towards shorter wavelengths, resulting in a blueshift in the star's light spectrum.
On the other hand, if a star is moving away from an observer on Earth, the opposite occurs. The wavelengths of the light emitted by the star get stretched due to the relative motion, resulting in an elongation of wavelengths and a redshift in the star's light spectrum.
Therefore, when a star is moving towards an observer on Earth, its light spectrum will appear blueshifted compared to the light spectrum of the sun.
When a vibrating object is moving an observer, the measured frequency of the vibrations will be lower than if the object and observer are both stationary. If the vibrating object is moving an observer, the measured frequency of the vibrations will be higher than the actual rate of vibration of the object. When a star is moving towards an observer on Earth, the light spectrum of the star will appear compared to the light spectrum of the sun, which is considered to be in Earth's frame of reference.
1 answer
1 answer