1 a vector lying along x aixs is its y component ?Explain 2 if a vector A lies in xy plane and angle with x axis the its y component will be
3 If | A+B | = | A -B | angle b/w the vectors is
4 if the resulant of 2 vectors each magntide F is also of magnitude F, the angle b/w them will be
5if the vectors A and B are magnitude 4 anmd 3cm making of 30 and 40 degree respectively withs x axis their saclar prouct will be
a 0 cm2
b 6 cm2
c 18 cm2
d 21 cm2
kindly explain all questions.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.