If you treat a 14 × eyepiece of a microscope as a magnifying glass that produces an image at infinity, what is its focal length? the microscope is designed for an image distance of 172 mm from the objective, and the objective is marked 25 ×. what is its focal length?

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?