Chapter 30 Review Questions

In fluorescence which has the higher energy, the radiation absorbed or the radiation of an emitted photon?

(a) absorbed

(b) emitted

(c) they both have the same energy

What type of spectrum would you expect to obtain if white light is shined through sodium vapor?

(a) an emission spectrum of sodium

(b) an absorption spectrum of sodium

(c) a continuous spectrum

What causes laser light to have all of its waves moving in the same direction?

(a) the mirrors in the laser

(b) the stimulated emission of the atoms to radiate in the same direction

(c) atoms are lined-up in the crystal so that they emit light only in one direction

Each element gives off a characteristic color when it undergoes the excitation and de-excitation process. The color is due to

(a) fluorescence

(b) secondary emission

(c) electrons moving to lower energy states

(d) refraction of light through the characteristic gas

(e) electrons giving off Cerenkov radiation

Which phenomenon has electrons getting "stuck" in excited states?

(a) incandescence

(b) fluorescence

(c) phosphorescence