When the sun is directly overhead the optical depth equals one (τ=1) at an altitude of 6 km. The neutral gas density at this altitude is 7×1011 particles/cm3. The ionization cross-section and photon flux at the top of the atmosphere have average values of σi = 3×10-19 cm2 and Itop= 5×109 photons cm-2 s-1, respectively.Calculate the photo-ionization rate at an altitude of 6 km for these conditions. Report answer in scientific notation to 2 significant digits.The photo-ionization rate is _____ cm-3 s-1

The rate at which photoionization takes place in a particular area of a medium, such as a gas or a…

Answered: When the sun is directly overhead the…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

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When the sun is directly overhead the optical depth equals one (τ=1) at an altitude of 6 km. The neutral gas density at this altitude is 7×10¹¹ particles/cm³. The ionization cross-section and photon flux at the top of the atmosphere have average values of σ_i = 3×10^-19 cm² and I_top= 5×10⁹ photons cm^-2 s^-1, respectively.

Calculate the photo-ionization rate at an altitude of 6 km for these conditions. Report answer in scientific notation to 2 significant digits.

The photo-ionization rate is _____ cm^-3s^-1

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