Consider two future observatories in space. Observatory X consists of a single 50-metre telescope. Observatory Y is an interferometre consisting of five 10-metre telescopes, spread out over a region 100 metres across. Which observatory can detect dimmer stars, and which one can see more detail in its images

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.