1 If angle B is the angle of reference, then the sine ratio would be: 17 cm
8 cm
15 cm
A.
15
17
B.
8
15
x
17
D.
15
8

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

spectral lines lyman is one set