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If a,b, and c are the unit vectors along...

If `a,b,` and `c` are the unit vectors along the incident ray, reflected ray and the outward normal to the reflector. Then

A

`vecb=veca-vecc`

B

`vecb=veca+(veca.vecc)vecc`

C

`vecb=2veca-vecc`

D

`vecb=veca-2(veca.vecc)vecc`

Text Solution

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The correct Answer is:
D
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PATHFINDER-VECTOR-I AND VECTOR-II-QUESTION BANK
  1. Component of (3hati+4hatj) parallel to (hati+hatj) is :

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  2. What is the angle between vecP and the resultant of (vecP+vecQ) and (v...

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  3. If a,b, and c are the unit vectors along the incident ray, reflected r...

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  4. If a unit vector is represented by 0.5hati + 0.8hatj + chatk the value...

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  5. If |vecA + vecB| = |vecA - vecB|, then the angle between vecA and vecB...

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  6. Two vectors vecA and vecB are such that vecA+vecB=vecC and A^2+B^2=C^2...

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  7. Given that P =12, Q = 5 and R = 13 also vecP + vecQ = vecR , then the ...

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  8. The angle between vecP+vecQ and vecP-vecQ will be

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  9. The vectors vecP = ahati + ahatj+ 3hatk and vecQ = ahati-2hatj-hatk ar...

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  10. The value of n so that vectors 2hati+3hatj-2hatk, 5hati+nhatj+hatk and...

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  11. If veca and vecb are two vectors then the value of (veca+vecb)xx(veca-...

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  12. The angle between the two vectors vecA=3hati+4hatj+5hatk and vecB=3hat...

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  13. Maximum and minimum values of the resultant of two forces acting at a ...

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  14. Which of the following expressions are meaningful ?

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  15. The vector i+xj+3 si rotated through an angle theta and doubled in mag...

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  16. Given sin(A+B)=sinAcosB+cosAsinB, which of the following relationships...

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  17. If y=sinx, then dy/dx=0, for x=

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  18. For the condition x^2-1gt0, we have

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  19. If x=loget, then select the correct option(s)

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  20. The resultant amplitude of two waves is given by R=sqrt(A^2+B^2+2ABcos...

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