According to Wikipedia:

Venusian clouds are thick and are composed mainly (75-96%) of sulfuric acid droplets. These clouds obscure the surface of Venus from optical imaging, and reflect about 75% of the sunlight that falls on them. The geometric albedo, a common measure of reflectivity, is the highest of any planet in the Solar System. This high reflectivity potentially enables any probe exploring the cloud tops sufficient solar energy such that solar cells can be fitted anywhere on the craft. The density of the clouds is highly variable with the densest layer at about 48.5 km, reaching 0.1 g/m^3 similar to the lower range of cumulonimbus storm clouds on Earth.

Can the typical size of the sulfuric acid droplets in the atmosphere of Venus be estimated from observation, or from calculation based on models of the atmosphere? Would the average size be expected to vary with altitude?

  • $\begingroup$ Possibly helpful: 1, 2, 3 It looks like the droplets are thought to be roughy in the 0.1 to 1μm range. $\endgroup$ – uhoh Jan 28 '18 at 10:58
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    $\begingroup$ @uhoh Thank you very much for your valuable information and for the editing of my question ! It looks much more scientific now. $\endgroup$ – Cornelisinspace Jan 28 '18 at 16:05
  • $\begingroup$ It's an interesting question! In Stack Exchange it's always better to do at least some research first, and to post what you know already. That helps guide others to understand better what will be needed for an answer. I'm sure you've done some reading already since you know there are sulphuric acid droplets, but its always better to mention in the question how you know. $\endgroup$ – uhoh Jan 28 '18 at 16:19
  • $\begingroup$ @uhoh I asked this question because i wanted to know if oxygen producing bacteria would fit in the droplets. Now i know for sure, not in the upper cloud region.! $\endgroup$ – Cornelisinspace Jan 28 '18 at 16:23
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    $\begingroup$ OK that's great! It is always OK to post a good answer to your own question, and to accept it also. If you know the answer to your own satisfaction, and feel like writing up a clear answer, go for it. But you might wait a bit (few days, may be a week) and see if someone else posts additional information. $\endgroup$ – uhoh Jan 28 '18 at 16:45

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