Calculate the potential of a infinitely long cylinder of radius a which has constant charge density p everywhere in space. your answer should be in cylindrical coordinates. b) how does the potential change if a cylinder of radius b < a is hollowed out of the middle so that the axis through their centers coincide. your answer should be in cylindrical coordinates. c) what is the electric field created in the above scenarios, use the same coordinates as the corresponding scenario. hint: a neutral volume is equivalent to overlapping charged volumes of equivalent magnitude but opposite sign.

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.