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Electrons from the solar wind arrive after a flight time from something 30 H to Earth, where they can generate polar lights.
In the case of polar lamps, green light rays are predominant, which, by stimulating the λ = 557.7 Nm They will be called.
Calculate that the kinetic energy of the electrons of the solar wind is sufficient to stimulate oxygen.
Note: The distance between the Earth and the Sun is equal to 150 The Commission's proposal km
Notes 2: m(e–)= 9.1·10-31 kg
Lösung: - · General idea: the kinetic energy must at least correspond to the stimulation energy
- · Ekin = ½ · m·v2
- = ½ · 9.1·10-31·(1.5·1011m/(30·3600))^2 = 8.8·10-19 J
- · EA = h·c/λ = 6.626·10-34Js·3.0·108/557.7·10-9 = 3.6·10-19 J
- · Ekin / EA = approx. 2.4
- i.e. there is more kinetic energy than stimulus energy present
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