Why is it that a wavelnegth reflects on something? I understand that white reflects all wavelengths because it contains all the spectrums of wavelengths, but WHY is it that is actually reflects? Like, is it because two matching wavelengths reflect? Please explain.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?