difference between curvature and torsion

  1.  What is the difference between curvature and torsion?

- Space curve are uniquely determined by two scalar quantities, called curvature and torsion. 

S.N.	Curvature	Torsion
1.	-Curvature measures deviation of a curve from a straight line.	-Torsion measures deviation of a curve from a plane.
2.	-Rate of change in the direction of tangent line.	-Rate of change in the direction of bi-normal line.
3.	-Straight line has zero curvature.	-Plane curve has zero torsion.
4.	-The expression of curvature is         t¢ =kn.	-The expression of torsion is b¢ =-tn.
5.	-The magnitude of curvature is denoted by k (Kappa).	- The magnitude of torsion is denoted by t (Tau).