03-02-2013, 08:41 AM
Quote:Well here's a tease from me,a question from University challange the other night; What's the focal length of a plain piece of glass?
Because parallel light rays never intersect it has no focal length.
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teasing time ... - by Klaus - 03-02-2013, 05:24 AM
teasing time ... - by soLong - 03-02-2013, 06:11 AM
teasing time ... - by davidmanze - 03-02-2013, 08:19 AM
teasing time ... - by Klaus - 03-02-2013, 08:20 AM
teasing time ... - by davidmanze - 03-02-2013, 08:32 AM
teasing time ... - by Klaus - 03-02-2013, 08:41 AM
teasing time ... - by davidmanze - 03-02-2013, 08:43 AM
teasing time ... - by popo - 03-02-2013, 09:23 AM
teasing time ... - by davidmanze - 03-02-2013, 09:50 AM
teasing time ... - by soLong - 03-02-2013, 10:37 AM
teasing time ... - by Guest - 03-02-2013, 04:19 PM
teasing time ... - by Klaus - 03-02-2013, 10:46 PM
teasing time ... - by soLong - 03-02-2013, 11:42 PM
teasing time ... - by Guest - 03-03-2013, 02:12 PM
teasing time ... - by soLong - 03-03-2013, 08:27 PM
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