HW2

A  Electrons have discrete energy levels.

B  Each element produces a unique pattern of spectral lines, like a fingerprint.

C  Photon emission occurs randomly, in any direction.

D  Absorption occurs when an electron in an atom jumps from a lower energy level to a higher energy level.

E  An electron in an atom may absorb either part or all of the energy of a photon.

A  If electromagnetic wave Simone has twice the wavelength of electromagnetic wave Ramon, then Simone also has twice the frequency of Ramon.

B  Human eyes are able to detect only a tiny fraction of all possible magnetic waves.

C  White light, such as sunlight, actually consists of many electromagnetic waves, having different wavelengths, mixed together.

D  The measured speed of an electromagnetic wave is independent of the speed of its source relative to the observer.

E  An electromagnetic wave consists of oscillating electric and magnetic fields that are perpendicular to each other and perpendicular to the direction of motion.

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  have higher frequencies and shorter wavelengths than lower-energy photons.

B  have more mass than lower-energy photons.

C  move faster than lower-energy photons.

D  are not as likely to become redshifted as lower-energy photons.

E  travel less distance between their source and the observer than lower-energy photons.

A  FALSE

B  TRUE

A  spectrum

B  absorbtion lines

C  emission lines

A  right to left

B  clock-wise

C  counter-clock-wise

D  there’s no way of telling from this information.