Question

What are 3D glasses made of?

Answer 1

old 3D glasses were made of a red lens and blue lens

modern 3D glasses are made up of polarized lens, meaning they only allow light waves to pass through in one direction
basically if you have a polarized lens that only allows horizontal light waves to pass through, then vertical light waves cant pass
so one eye see's horizontal light and the other see's vertical light

well i think thats how they work

Answer 2

thanks do you know this one
A point P is on a line segment, which has two electrical charges, A and B, as its end points. If the electric field at point P due to charge A is +7.1 × 10¢ newtons/coulomb and the field due to charge B is +2.2 × 10¢ newtons/coulomb, what is the net electric field at
point P ?

Answer 3

coulombs law?

Answer 4

measure the field at P from A
then measure the field at P from B
add them together
and you get the field at P

Answer 5

got it how about this one
What is the relationship between the electric field strength at a point and its distance from the source charge?

Answer 6

again look at coulomb's law
i believe its like 1/r^2

Answer 7

as the distance increases the electric field strength increases?

Answer 8

it decreases

if r= 1 then field =1
if r=2 then field = 1/4
3 --1/9
kinda like 2 magnets

Answer 9

How would the force of a test charge change if the electric field
is doubled?

Answer 10

ok F= K q1 q2 /r^2

if we're just looking at q1, and everything else remains constant, what happens to F when you multiply q1 by 2

Answer 11

its doubled?

Answer 12

yes

Answer 13

If the force experienced by a positively charged balloon is
2.7 newtons and the electric field strength is 7.8 × 10¢ newtons/coulomb, what is the magnitude of the charge on the balloon?

Answer 14

just look at units
and determine how you go about getting just coulombs

Answer 15

i really dont understand that one

Answer 16

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