Reply To:Calculation QM 2 (qm-02) 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:

1. · General idea: the kinetic energy must at least correspond to the stimulation energy
2. · E_kin = ½ · m·v²
3.     = ½ · 9.1·10^-31·(1.5·10¹¹m/(30·3600))^2 = 8.8·10^-19 J
4. · E_A = h·c/λ = 6.626·10^-34Js·3.0·10⁸/557.7·10^-9 = 3.6·10^-19 J
5. · E_kin / E_A = approx. 2.4
6.     i.e. there is more kinetic energy than stimulus energy present