Which of the following statements about the characteristics of the aurora are tr

ID: 114966 • Letter: W

Question

Which of the following statements about the characteristics of the aurora are true? Choose all that apply.

(a) Auroral light is a continuous spectrum.

(b) Excited nitrogen molecules emit red, blue, and violet light.

(c) Auroral displays are caused by energetic particles flowing along magnetic field lines from deep in the magnetotail to the upper atmosphere.

(d) Auroral light is produced mainly below 100 km.

(e) The aurora oval is both a northern and southern polar region phenomenon.

(f) The aurora is most intense on the dayside of the earth, but can only be seen on the nightside.

(b) Excited nitrogen molecules emit red, blue, and violet light.

The color of the aurora depends on the wavelength of the light emitted.

(c) Auroral displays are caused by energetic particles flowing along magnetic field lines from deep in the magnetotail to the upper atmosphere.

The aurora is caused by the interaction of high-energy particles (usually electrons) with neutral atoms in earth’s upper atmosphere

(e) The aurora oval is both a northern and southern polar region phenomenon.

The north pole aurora is called the aurora borealis and the aurora at the south pole is called the aurora australis.

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