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In order to accelerate the ions in the correct direction, the electric field in the region between the two plates of the device in Figure 1 should be directed toward:
(A) top
(B) bottom
(C) left
(D) right
A: D because positive ions are accelerated between the two plates and the electric field must be directed towards the same direction the ions are to be accelerated.
I understand this, but how is it known that ions accelerated between the two plates are positive?
Thanks.
(A) top
(B) bottom
(C) left
(D) right
A: D because positive ions are accelerated between the two plates and the electric field must be directed towards the same direction the ions are to be accelerated.
I understand this, but how is it known that ions accelerated between the two plates are positive?
Thanks.