Afriend in your class tells you that she never uses hints when doing her mastering homework. she says that she finds the hints , but when the hint asks another question it increases the chance that her score on the problem will go down. she feels like it isn't worth the risk. you reassure her that there is nothing to fear about opening a hint that asks a question. which of the following are good reasons for your friend not to worry?

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.