Ch. 3 Light Quiz

True/False: Lines of a particular element appear at the same wavelength in both emission and absorption line spectra.

True

True/False: Sunsets are red because sunlight must pass through more atmosphere then, and the atmosphere scatters even more light at bluer wavelengths, leaving mostly red light to color the sky.

True

True/False: The sky is blue because molecules in the atmosphere scatter blue light more effectively than red light.

True

Which of the following statements best describes the two principle advantages of telescopes over eyes? a) Telescopes can collect far more light with far better angular resolution. b) Telescopes collect more light and are unaffected by twinkling. c) Telescopes have much more magnification and better angular resolution. d) Telescopes can collect far more light with far greater magnification.

a) Telescopes can collect far more light with far better angular resolution.

Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. Is the star moving towards or away from us, or can we not tell?

moving towards us