# Answer to Question #52040 in Quantum Mechanics for promise

Question #52040

Which of the following correctly gives the direction of a vector product

c⃗ =a⃗ ×b⃗

?

If the right thumb points in the direction of

a⃗

and the other fingers point in the direction of

b⃗

, then the palm pushes in the opposite direction of

c⃗

If the right is held such that the curled fingers follow the rotation of

a⃗

into

b⃗

, then the extended right thumb points in the direction of

c⃗

If the left thumb points in the direction of

a⃗

and the other fingers point in the direction of

b⃗

, then the palm pushes in the direction of

−c⃗

The direction of retreat of the right-handed screw when turned from

a⃗

to

b⃗

through the smaller angle.

c⃗ =a⃗ ×b⃗

?

If the right thumb points in the direction of

a⃗

and the other fingers point in the direction of

b⃗

, then the palm pushes in the opposite direction of

c⃗

If the right is held such that the curled fingers follow the rotation of

a⃗

into

b⃗

, then the extended right thumb points in the direction of

c⃗

If the left thumb points in the direction of

a⃗

and the other fingers point in the direction of

b⃗

, then the palm pushes in the direction of

−c⃗

The direction of retreat of the right-handed screw when turned from

a⃗

to

b⃗

through the smaller angle.

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