Light day 2 k

8/3/2019 Light day 2 k

1/19

Agenda

1. Look at sources of light

2. Electromagnetic Spectrum (EM Spectrum)

3. See homework on next slide

Handy: Get workbooks Study Guide B from

They are in the back of the room. They can be

kept here for notes.

Please write in them. Start page 35.

You should find answers from the lecture ppt.


2/19

Homework:

Interactive Reader

1. Before you READ- answer questions even if

you have to answer later on.

2. Reading Check and Take a look

3. Math Focus and Reading check


3/19

http://www.ngfl-cymru.org.uk/vtc/light/eng/Introduction/

Sources of Light

Sources of Light Non-Sources of Light


4/19

Light =

Energy (waves transfer energy) http://library.thinkquest.org/27066/lightrays/nlreflection.html

EM wave Electromagnetic Radiation a form of radiation

Light does not NEED to travel through matter

It CAN go through mater (stuff plastic or glass)

It DOES go through the vacuum of space


5/19

7 types

EM Wavespage 77 of textbook

1. Radio

2. Micro-

3. Infrared4. Visible light

5. Ultraviolet

6. X-ray

7. Gamma ray

What is the electromagnetic spectrum?


6/19

7 types

EM Wavespage 77-79 of textbook

1. Radio

2. Micro-

3. Infrared4. Visible light

5. Ultraviolet

6. X-ray

7. Gamma ray

The electromagnetic is the entire spectrum


7/19

7 types

EM Wavespage 77 of textbook

Visible light

The electromagnetic spectrum is the entirerange of electromagnetic waves.

Will focus on Visible light, mostly

Bring out the rope look at waves


8/19

en ave you seen w e g

separated into colors in real

life? Visible light

Is around 10-6

Itison

ly a

small

band

w

ith

in

the

EM spectrum

Wave length is themost importantdifference

EM wave =

consist of e~ and magnetic fields


9/19

A rainbow occurs when sunlight shinesthrough raindrops.


10/19

White Light

Draw and color howwhen you were looking through the glasses,

you saw frequency white light separated-

stretched outWarm-Up:

(Describe in words and also draw what you

see when you use the diffraction disk tolook at the white light)


11/19

White Light

1. On a separate sheet of paper, draw a longerand a shorter wavelength.

1. Label which wave length is longest

2. Which one would represent a infrared wave?

3. Which one would represent a visible light wave


12/19

3R

Electromagnetic Spectrum

02/10/10

(Use a few lines to draw a wave on your paper.)

Electromagnetic Spectrum A range of

different sized waves made of energy.


13/19

Infrared page 78of textbook, 42 of interactive

http://en.wikipedia.org/wiki/File:Ir_girl.png

Warmth heat We are warmed from

Infrared rays from the sun

All things give off infrared rays

Warmer objects give off more

Infrared waves than cooler objects

Online textbook: http://my.hrw.com/tabnav/controller.jsp?isbn=0030465346

User: sking798 pass: j6p7p


14/19

Bees see UV (Ultra-violet) light that

is invisible to human eyes.

Humans Bees


15/19


16/19

4L

Electromagnetic Spectrum Reflection02/11/10Reflection Questions:

(Answer the following questions in completesentences:

1.What is the only part of the

electromagnetic spectrum that we can seecalled?

2.Is that part a big or small part of the entire

electromagnetic spectrum?)


17/19

Electromagnetic Spectrum


18/19

en ave you seen w e g

separated into colors in real

life?


19/19

A rainbow occurs when sunlight

(white light) shines through

raindrops.

Light day 2 k

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