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Flashcards in Polarization I Deck (36):
1

Wave with electric and magnetic fields perpendicular to each other. Transverse wave

Electromagnetic wave

2

Longitudinal wave

Slinky, parallel

3

Transverse wave

Perpendicular

4

Oscillation occurs in a x,y plane perpendicular to the z direction of propagation

Transverse

5

Polarization is a property of _______ waves that describes their oscillations in (x,y) plane

Transverse

6

A completely random of waves vibrating in all planes

Unpolarized light

7

For electromagnetic waves propagating perpendicular to the plane of the paper, the double headed arrows show the vibration plane of the electrical field component for three different states

Polarized light

8

What are the three different polarization states?

Vertical, horizontal, and diagonal

9

A dipole with a vertical axis produces _________ polarized light

Vertically

10

A mixing of polarized and unpolarized waves

Partially polarized light

11

What are hte 4 fundamental properties of light?

-intensity (amplitude)
-wavelength
-polarization
-coherence

12

________ describes the directional orientation of the lights electric field in both space and time

Polarization

13

The vibration of the electric field is confined to a single plane

Plane-polarized light

14

From the vantage point along the Z axis, the electric field appears to trace a line, so the light may also be said to be _________

Linearly polarized

15

The electric friend for _________ light has no consistent plane of oscillation

Unpolarized

16

From the vantage point along the z axis, the electric field for polarized light can look like:

-linearly polarized (vertical)
-elliptically polarized
-circularly polarized
-linear polarized (horizontal)

17

What defines the polarization type of the light?

The trace of the electric field

18

Polarization properties of light can be changed by:

-selective absorption
-reflection
-scattering
-birefringance

19

The _________ selectively transmits all or most of the electric field parallel to its axis, which removing most of the field in the perpendicular direction. Thus the unpolarized light incident on the polarizer is converted into linearly polarized light

Linear polarizer

20

What does a slit act like as far as polarization goes?

Linear polarization

21

What happens if you place a 90 degree polarizer over an 180 degree polarizer

Cancel each other

22

How to calculate how much light is transmitted when there are two polarizer present

Law of malus
Ix=Im[cos^2(theta)]
Measured in amplitude

23

The first polarizer, transmits 100% of light if the polarization axis is aligned with transmission axis

Polarizer

24

The second polarizer, analyses the plane polarization properties of the light incident on it.

Analyzer

25

Direction of polarization can be resolved into what two components?

In the plane of this diagram and perpendicular to it

26

If a beam of non polarized light is incident on the surface of a smooth, nonconductor such as glass or plastic, the fraction of reflected light will be what?

Will be at least partially polarized

27

The reflected light is totally polarized (when reflected light is perpendicular to refracted light )

Brewster's angle

28

What is the equation for brewsters angle

Tan(thetab)=(n2/n1)

29

Fresnel's prediction

0.04 % reflectance

30

The percentage of incident light reflected from a glass surface. For all angles of incidence except ) and 90, then what?

The reflected light is at least partially polarized

31

What angle should the transmission axis of a polarized filter be placed in order to reduce these unwanted reflections?

For polarized sunglasses, the transmission axis should be within +/ degrees of vertical (an industry standard)

32

What does the correct orientation of the polarized filter do?

Effectively removes the reflected sunlight and permits view of the underlying objects

33

Reflection off water is always _______

Horizontal

34

Glare from water surface readily passes through the polarized filter whose transmission axis is _______

Horizontal

35

Glare from water surface blocked by polarized filter whose transmission axis is _____

Vertical

36

Purpose of antireflective coating

-destruction interference
-reduce glare
-cosmetic
-add polarization too