Subject: kepler motion applet
Date: Thu, 23 Sep 1999 06:00:13 -0700 (PDT)
From: lee taishen <leetaishen@yahoo.com>
To: hwang@phy03.phy.ntnu.edu.tw
Dear Mr. Hwang,
Referring to the kepler motion applet in the below
add.
http://www.phy.ntnu.edu.tw/java/Kepler/Kepler.html
I find it very interesting. However, I have some
difficulties when using the applet.
1. For second kepler law, the area of the shaded area
and non-shaded area should be the same. However, there
is no data showing what the area is.
2. for third kepler law, i observed that there is no
indication of the period of the planet. There is this
T value indicated in the applet but it is not the
period. i would appreciate if you can explain what the
T value is.
thank you.
best regards
leetaishen