Ima Ch.5: The Nature Of Light

Front 1

The first endeavor to measure the speed of light was orchestrated by who?

Back 1

Olaf Romer

Front 2

When did olaf romer orchestrate the first endeavor to measure the speed of light?

Back 2

1676

Front 3

What is the speed of light (in miles)?

Back 3

186,000 miles per second

Front 4

Electromagnetic Spectrum:

Back 4

ia made up of seven parts, of which visible light is only one.

Front 5

Radio Waves:

Back 5

which have low frequency and a long wavelengthm are quite prevelant in day-to-day life. (e.g Radio broadcasts, garage door openers, television broadcasts company, ect.)

Front 6

Microwaves:

Back 6

are predominately used to heat cuisine and support innumerable pager and cell phone transmissions in the course of a day.

Front 7

Infrared:

Back 7

waves are mostly associated with thermal energy.

Front 8

Visible:

Back 8

light rays are common to everyday life. Everything seen by the human eye is visible light.

Front 9

What 7 colors compromise the Visible light rays?

Back 9

Red, orange, yellow, green, blue, indigo, violet.

Front 10

Ultraviolet (UV):

Back 10

rays surpass visible light to
the right along the EM spectrum. The sun is the earth's greatest source of UV rays.

Front 11

X-rays:

Back 11

are a type of EM radiation with a very short wavelength and high frequency; so minute they can negotiate around molecules; it is the property that enables the X-ray imaging of otherwise impenetrable matter.

Front 12

Gamma:

Back 12

rays are the highest-frequency waves represented in the EM spectru; are even more invasive then X-rays; they are known for to surge from stars exploding in space.

Front 13

How are Gamma rays emitted?

Back 13

By radioactive material.

Front 14

What is light?

Back 14

A particular frequency range of electromagnetic (EM) spectrum.

Front 15

True or Flase: Light is a form of energy.

Back 15

True

Front 16

The electromagnetic theory was asserted by who and when?

Back 16

James Clerk Maxwell in the late 19th century.

Front 17

What was the heart of James Clerk Maxwell's theory?

Back 17

The notion electromagnetic field, propgating away from its orgin in the form of wave.

Front 18

What is the electromagnetic theory states ________________.

Back 18

As soon as you have energy you have created magnetism abd visa versa.

Front 19

What did Nicholas Tesla predict in 1895

Back 19

Wireless telephony.

Front 20

Who patented the wireless radio, in 1896?

Back 20

Guglielmo Marconi.

Front 21

Why was the wireless radio limited to maritime use?

Back 21

The lack of amplification technology.

Front 22

How were the wireless radios broadcasted?

Back 22

Morse Code.

Front 23

What made amplification possible?

Back 23

Vacuum Tubes.

Front 24

What was the first experimental commercial radio station? When did it make it first broadcast?

Back 24

KDKA in Pittsburgh, Pennsylvania; November 2,1920.

Front 25

Who formed the first radio network? What network did they form and when?

Back 25

RCA, in Partneship with Westinghouse and General Electrics; National Broadcasting Company (NBC) in 1926.

Front 26

What year did demand for recording music begin to demand in the U.S?

Back 26

1923

Front 27

Who controlls the use for spectrum wavelength for broadcasting and communication?

Back 27

FCC-(Federal Communicatons Comission)

Front 28

What is the FCC's role?

Back 28

To allocate portions of the industry & goverment and also enforce that the airwaves are being used in the public interest.

Front 29

What is the defining characteristic of light? What does it do?

Back 29

Frequency; The frequency of ligth waves.

Front 30

What does color refer to?

Back 30

To the frequency and the mixtures of frequencies of light.

Front 31

What is the speed of radio waves?

Back 31

186,000 miles per second.

Front 32

What is the measurement for direct light?

Back 32

Lumen.

Front 33

The worl's first commercial radio is ________ in ________.

Back 33

KDKA in Pittsburgh

Front 34

The visible color with the highest frequency is?

Back 34

Violet.

Front 35

Amplitude=

Back 35

Brightness

Front 36

Measuring light amplitude or brightness operate on one or two stragtegies:

Back 36

measurement of direct light source;measurment of light reflected off of surfaces

Front 37

lumen=

Back 37

direct light source

Front 38

foot candle=

Back 38

light intensity or reflected light.

Front 39

As wavelength measurements ________ , the amount of energy ________.

Back 39

decrease; increase

Front 40

What two characteristics affect the perception of distinct color?

Back 40

Hue and Saturation

Front 41

Hue=

Back 41

color; dominant wavelength

Front 42

Saturation=

Back 42

the amount of light concentrated at a particular wavelength.

Front 43

What is the level of perveived whiteness is identified as color _______.

Back 43

temperature

Front 44

Additive Color process:

Back 44

is the method of creating color by mixing various proportions of two or three distinct colors of light.

Front 45

Subtractive Color Process:

Back 45

is concerned with pigments and absorption of color.

Front 46

A _________ is essentially a filter that absorbs certain colors.

Back 46

pigment

Front 47

Equal=

Back 47

porportions of two primary additive colors that create a subtractive pigment.

Front 48

Unequal=

Back 48

proportions of two or three additive colors that create other pigments.