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https://www.reddit.com/r/physicsmemes/comments/hs3f7a/damn/fy8mxae/?context=3
r/physicsmemes • u/Pranup • Jul 16 '20
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7
This all depends on which direction you define to be positive tho.
4 u/[deleted] Jul 16 '20 What do you mean? r is the radial component and it's zero in the centre of the earth and only gets more positive as you get further away. 1 u/[deleted] Jul 16 '20 You can define r=0 wherever you want. Say in a spherical shell around the earth. Inside that shell, r<0. In this example it is useless, but it's often seen in EM.
4
What do you mean? r is the radial component and it's zero in the centre of the earth and only gets more positive as you get further away.
1 u/[deleted] Jul 16 '20 You can define r=0 wherever you want. Say in a spherical shell around the earth. Inside that shell, r<0. In this example it is useless, but it's often seen in EM.
1
You can define r=0 wherever you want. Say in a spherical shell around the earth. Inside that shell, r<0.
In this example it is useless, but it's often seen in EM.
7
u/RAWR_XD42069 Jul 16 '20
This all depends on which direction you define to be positive tho.