convergent
Two or more lines meeting at a common point are called intersecting lines.
Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise.
two lines meeting at a point.
An angle
Lines that share a common point are called an intersection, or intersecting lines.
Intersecting lines
are convergent lines.
Two or more lines meeting at a common point are called intersecting lines.
Yes. If the star is moving away from the Earth, its spectral lines will shift towards the red end of the spectrum. If it is moving towards the Earth, its spectral lines will shift towards the violet end of the spectrum. This is due to Doppler effect.
The spectral lines move towards one direction, or towards the other direction, depending on the relative speed.
They will be blueshifted, that is their wavelengths will be shortened and their frequencies increased.
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
It would change by shifting to the wavelength blue.
Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise. Minimum and maximum requirements: three straight lines meeting pairwise.
Intersection.
It means the heading towards us, red means it is moving away from us.
They both cross paths. Intersecting lines can cross paths in any ways, but perpendicular lines have to cross at 90 degrees.