184_notes:right_hand_rule

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184_notes:right_hand_rule [2018/02/23 14:34] – dmcpadden184_notes:right_hand_rule [2018/02/23 14:54] (current) – dmcpadden
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 $$\vec{A} \times \vec{B} = \vec{C}$$ $$\vec{A} \times \vec{B} = \vec{C}$$
 Because this is a cross product, all three vectors are perpendicular to each other.  Because this is a cross product, all three vectors are perpendicular to each other. 
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-{{183_notes:rhrv1.png?100}} {{183_notes:rhrv1.5.png?100}} 
  
 Remember, this rule is true for your **//RIGHT//** hand, not your left hand! (If you are right handed, remember to put your pencil down!)  Remember, this rule is true for your **//RIGHT//** hand, not your left hand! (If you are right handed, remember to put your pencil down!) 
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 In this method, you start with your hand completely open and in an "L" shape. Point your fingers in the direction of $\vec{A}$, then curl your fingers toward the direction of $\vec{B}$. Whichever way your thumb points is the direction of $\vec{C}$. In this method, you start with your hand completely open and in an "L" shape. Point your fingers in the direction of $\vec{A}$, then curl your fingers toward the direction of $\vec{B}$. Whichever way your thumb points is the direction of $\vec{C}$.
  
 +{{183_notes:rhrv1.png?150}} {{183_notes:rhrv1.5.png?150}}
  
 In the case of these pictures, $\vec{C}$ would point out of the whiteboard.   In the case of these pictures, $\vec{C}$ would point out of the whiteboard.  
  
 ====Method 2 - Three Fingers==== ====Method 2 - Three Fingers====
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 +{{  184_notes:rhrv2.png?200|Three fingers}}
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 In this method, you start with your thumb and first finger in an "L" shape. Then extend your middle finger so it is perpendicular to the "L". Hold your fingers in this shape, and rotate your hand so that your first finger points in the direction of $\vec{A}$ and your middle finger points in the direction of $\vec{B}$. **Note: you are rotating your whole hand here, not moving your fingers at all.** (At no point should you be flipping anyone off with this Right Hand Rule.)  In this method, you start with your thumb and first finger in an "L" shape. Then extend your middle finger so it is perpendicular to the "L". Hold your fingers in this shape, and rotate your hand so that your first finger points in the direction of $\vec{A}$ and your middle finger points in the direction of $\vec{B}$. **Note: you are rotating your whole hand here, not moving your fingers at all.** (At no point should you be flipping anyone off with this Right Hand Rule.) 
  
-{{  184_notes:rhrv2.png?200|Three fingers  }} +Then, again, your thumb will point in the direction of $\vec{C}$, which in this case is out of the whiteboard.
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-Then, again, your thumb will point in the direction of $\vec{C}$, which in this case is into the whiteboard.+
  
  
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  • Last modified: 2018/02/23 14:34
  • by dmcpadden