What distinguishes mass from weight?
a. mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.
b. weight is a measure ofthe amount of matter in an object, while mass is a measure of the force of gravity on the object.
c. mass is a measure of an object's inertial force, and weight is the force exerted by that object on other objects.
d. mass and weight are synonyms and ultimately describe the same principle?

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.