The scattering of light is primarily caused by the interaction of light with particles or molecules in the Earth's atmosphere. Therefore, to observe the Sun's rays as a straight line of light without significant scattering, you would need to move outside of the Earth's atmosphere, into the vacuum of space.
From space, where there is no atmosphere to scatter the sunlight, the Sun's rays would appear as straight lines. However, it's important to note that the rays of sunlight are not actually physical entities, but rather the paths along which light travels in straight lines. The Sun emits light in all directions, and the rays of light are straight lines that can be traced back to their source, which is the Sun.
To achieve this view, you would need to be at a sufficient distance from the Sun so that the light rays appear parallel. This distance can be estimated by considering the angular size of the Sun as seen from Earth, which is approximately 0.5 degrees. If you move far enough away from the Sun, the angular size of the Sun would decrease, and the rays of light would appear closer to parallel lines.
The specific distance required to observe the Sun's rays as a straight line would depend on the desired level of accuracy and the observer's definition of a "straight line." However, in practical terms, achieving a view of the Sun's rays as perfectly parallel lines would require moving millions of kilometers away from the Sun, far beyond the Earth's orbit.