Earth orbits Sun a
Earth orbits Sun in circular path with the same speed because its total angular momentum is unchanged
b
Earth orbits Sun in elliptical path at faster speed when it's near the Sun because its total angular momentum changes
c
Earth orbit Sun in elliptical path at slower speed when it's near the Sun because its total angular momentum is unchanged
d
Earth orbits Sun in elliptical path at faster speed when it's far from the Sun because its total angular momentum is unchanged
e
Earth orbits Sun in elliptical path with same speed because its total angular momentum is unchanged
f
Earth orbits Sun in elliptical path at slower speed when it's far from the Sun because its total angular momentum is unchanged

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.