Answer: get smaller
Explanation:
Parallax is the angle formed by the observation lines to a very distant object from two separated points.
The procedure to measure this distance in the case of a star, is based on observing it from two different places far away from each other, and then through trigonometry reach to the following relationship:
(1)
Where:
is the distance from Earth to the observed star (in Parsecs
)
is the earth-sun distance that is equivalent to an astronomical unit (1AU=150000000km)
is the angle of the parallax (in arc seconds
)
Now, the distance to an object (measured in parsecs) is the reciprocal of the parallax (measured in arcseconds). Then, in its simplified mode, the stellar parallax is given by the following equation:
(2)
As we can see, there is an inverse relation between the distance
and the parallax
:
(3)
Hence, if the distance is increased by a factor of 10, the parallax is decreased by a factor of 10.
In other words, the parallax angle gets smaller.
In general, the borders of the federal state of Washington are in accordance to natural physical features.
The border with Canada,, the northern one, is defined by the Okanogan Range and the Kettle Range, two highlands.
The border with Oregon, the southern one, is defined mostly with the Columbia River, and partially by the Blue Mountains.
The border with Idaho, the eastern one, is defined with the edge of the lowland part of the Columbia River Basin.
While the western border is a border with the open water of the Pacific Ocean.
Your answer is A reflection.