Talk:Contact angle

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[edit] Verbatim text

Text in the measurement techniques section is copied verbatim without citation from the reference at the end of the page pointing to kruss.info. This is in bad form and should be rectified.

[edit] Edit Picture Needed

In the last diagram of the page, a mysterious tensoin arrow is labeled as "SG", I believe this is supposed to be SV. Someone fix it!

It would be good to show an example on this page of both a -phobic and -philic contact angle.204.227.241.18 22:14, 15 August 2007 (UTC)


Any idea how the drop size effect contact angle?

[edit] 150 degrees?

How can you have a contact angle greater than 90? Does anyone have a picture of this?--UltraHighVacuum 20:56, 12 December 2006 (UTC)

This is answered in the text 'typical contact angles', with pictures if you follow links. —The preceding unsigned comment was added by Berland (talkcontribs) 09:27, 17 January 2007 (UTC).

further information: actually, the contact angle can be more than 90 degrees. If the liquid's cohesive forces dominate over the adhesive forces between the liquid-surface interface, then the liquid will, rather than 'wet' the surface, become a 'ball'. Due to this, the contact angle, defined as the tangent to the contact surface, will exceed 90 degrees.