Light day 2 feb

8/3/2019 Light day 2 feb

1/20

Agenda

1. Look at sources of light

2. Electromagnetic Spectrum (EM Spectrum)

3. See homework on next slide

Handy: Get workbooksStudy Guide B

from

They are in the back of the room. They can bekept here for notes.

Please write in them. Start page 35.

You should find answers from the lecture ppt.


2/20

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


3/20

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

Sources of Light

Sources of Light Non-Sources of Light


4/20

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 matter (stuff plastic or glass)

It DOES go through the vacuum of space


5/20

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?


6/20

7 types

EM Wavespage 77-79 of textbook

1. Radio

2. Micro-

3. Infrared

4. Visible light

5. Ultraviolet

6. X-ray

7. Gamma ray

The electromagnetic is the entire spectrum


7/20

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


8/20

en ave you seen w e g

separated into colors in real

life? Visible light

Is around 10-6

It

ison

ly a

small

band

w

ith

in

the

EM spectrum

Wave length is themost importantdifference

EM wave =

consist of e~ and magnetic fields


9/20

A rainbow occurs when sunlight shinesthrough raindrops.


10/20

White Light

Draw and color howwhen you were looking through the glasses,

you saw frequency white light separated-

stretched out

(Describe in words and also draw what you

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


11/20

White Light

1. On a separate sheet of paper, draw a longer and 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

http://www.teachersdomain.org/resource/npe11.sci.phys.energy.lightbehaviors/


12/20

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

4. Show that you understand what a wavelength is.


13/20

3R

Electromagnetic Spectrum

02/10/10

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

Electromagnetic SpectrumA range of

different sized waves made of energy.


14/20

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


15/20

Bees see UV (Ultra-violet) light that

is invisible to human eyes.

Humans Bees


16/20


17/20

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?)


18/20

Electromagnetic Spectrum


19/20

en ave you seen w e g

separated into colors in real

life?


20/20

A rainbow occurs when sunlight

(white light) shines through

raindrops.

Light day 2 feb

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