Atoms Can Be Excited by

Q14: If light in a spectroscope passed through

Q15: If the radiation curve for an incandescent

Q16: Comparing the light from a glowing tube

Q17: Physicists find that the energy states of

Q18: In the process of fluorescence, part of

Q20: A radio wave and a visible light

Q21: The white light emitted by a fluorescent

Q22: Spectral lines take the shape of vertical

Q23: The dark lines in the Sun's spectrum

Q24: Astronomers can tell whether a light source