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AP Physics 2: 1.1 Waves 413 Views


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Description:

AP Physics 2: 1.1 Waves. Find the light intensity.

Language:
English Language

Transcript

00:00

Fine we sneak And here's your shmoop du jour brought

00:05

to you by bowling we love falling because we can

00:09

eat a cheeseburger fries and drink a soda while we

00:11

do it and still claim that we played a sport

00:15

all right Local kingpin ex fair just tinted the windows

00:18

of his suv Unfortunately they were done using a horizontal

00:22

axis of polarization Not only is this ineffective in reducing

00:26

glare but it's downright dangerous when x spare where's his

00:29

vertically polarized shades this bowler is as impatient as he

00:34

is bolland so he demands a quick temporary fix from

00:38

one of his unique mates until the windows air redone

00:41

the solution is to wear clip on sunglasses over his

00:44

shades not the dorky clip ons These look good The

00:48

clip ons are rigged to have a polarizing access rotated

00:51

thirty degrees from the horizontal What is the light intensity

00:55

shining upon x fares Eyes take i to be the

00:59

intensity transmitted by the suv windows and hear the vigilante

01:09

Man professional bowlers can be a pretty big time Maybe

01:12

we should be working on the physics of the seven

01:14

ten split Well we know that thanks to the lousy

01:17

tin job the polarization axis for the windows and the

01:19

clip ons is thirty degrees on ly A portion of

01:22

the electric field will pass through those sweet stylish lenses

01:25

into experience Delicate eyes The component of light parallel to

01:29

the polarization axis is what makes it through That would

01:32

be the co sign of thirty degrees Now the sunglasses

01:35

have a polarization of ninety degrees since their vertically polarize

01:39

That means that combined with clip ons of polarization angle

01:42

of the eyewear is sixty degrees and they're transmitted Field

01:45

is the same with the windows and the clip ons

01:48

Well the intensity of the field is proportional to the

01:50

square of the fields Magnitude in this case the resulting

01:53

field after passing through everything is he's Up to now

01:56

we can put the pieces together Intensity is equal teo

01:59

e sub two squared and east up two squared equals

02:02

the starting field squared times the coastline of thirty degrees

02:05

squared times the coastline of sixty degrees squared that mass

02:09

Shows the resulting intensity after it gets polarized pieces is

02:12

three sixteenths of the original intensity So the correct answer

02:17

is a that hopefully that's enough liketo let expert here

02:20

see out of his windows You got an accident Ruin

02:24

his athletic career And again anyone who calls themselves expert

02:28

uh probably could use a jolt Nothing too hard Just

02:30

enough to knock that goofy name out of it The 00:02:34.958 --> [endTime] reich

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