Suppose a telescope has a perfect objective mirror and its resolution is limited only by diffraction. when viewing with light with a wavelength of 400 nm, what is the smallest diameter of the mirror in order to resolve two objects separated by 1.0 km on mars from the earth at a time when the earth-mars distance is 80 million kilometers? (a) 39 m(b) 390 m (c) 3.9 m (d) 3.9 km (e) 39 km

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

Wouldnt it be millileter