NOVEMBER 20 (A DAY)NOVEMBER 21 (B DAY)

SCIENCE

Interactive Notebook

Add this entry to your notebook: 6.P.1.2: Visible Light

Also add this entry to your table of contents…

Our standard….

6.P.1.2: Explain the relationship among visible light, the electromagnetic spectrum, and sight

Today’s objective is to find out….

What does it mean for light to be reflected?How can light be absorbed?How is light refracted in water?How can light be transmitted or scattered?

Study Jams video

1. What does it mean for light to be reflected?

2. What does it mean for light to be refracted?

3. How is light absorbed?

Light

Light is a form of energy emitted by the Sun and light producing objects on Earth. Examples: a flashlight, classroom lights, a candle

Write these notes!

Interactive notebooks….

Today you will be recording information and drawing various images for visible light

You will find the next 2 blank pages in your notebook and draw a vertical line down the middle

See teacher exampleThe left side will be imagesThe right side will be notesDoes anyone have any questions?

Draw and label pictures….

Draw and label pictures….

Refraction

Draw and label pictures….

Scattering

Draw and label pictures….

Transmission

Draw and label pictures….

Reflection

Draw and label pictures….

R-red O-orange Y-yellow G-green B-blue I-indigo V-violet

Visible light

Visible Light

Can be seen when light waves are emitted (given off) and light enters our eyes.

Visible light travels in transverse waves.

It has different wavelengths Human eyes only respond to “visible light wavelengths” within the electromagnetic spectrum

Write these notes!

Introduction to Light

Brain Pop video“Light”

How do we see different colors?

Brain Pop video“Color”

Bill Nye: Light and Color

Light Transmission – 2 types

Definition - when light travels through a surface or object. 1. Direct: light goes through air or glass

2. Diffused: light goes through frosted materials (privacy glass)

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Reflected Light - Notes

Light hits a smooth surface and bounces off Light can be absorbed (taken in) or

reflected (bounced off )White light = contains all the colors

(ROYGBIV) Absorbed light = the colors not seen Reflected light = the colors seenWhite objects reflect all the colors (ROYGBIV) Black objects absorb all the colors of light

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Reflected Light - Notes

White light shining on an apple:The color red bounces off the apple

and enters our eyes while all the other colors are absorbed

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Reflected Light: Introduction Video

Discovery Ed video “ Reflected Light” (1:08 minutes)

The colors we see are the colors reflected by objects; this explains why different objects have different colors

Green Shamrock (green is reflected) Yellow Banana (yellow is reflected) Orange Pumpkins (orange is reflected)

Reflected Light

Reflected Light - Notes

This is why we wear light colored clothes in the summer because more colors are reflected and we feel cooler

This is why when we wear dark clothing in the summer, we feel hotter (it is absorbing light, just like our radiometer experiment too)

Write these notes!

Now it’s your turn….

Pick five items in the classroom and for each item list what color is being reflected and what colors are being absorbed.

Ms. Maas’ Five!

1. Black Lab Table Tops = it is absorbing all colors (ROYGBIV) and reflecting black (we see)2. Yellow Textbooks = reflecting yellow (we see) and absorbing ROGBIV3. Blue Chairs = reflecting blue (we see) and absorbing ROYGIV4. Green Plant = reflecting green (we see) and absorbing ROYBIV5. American Flag Red Stripes = reflecting red (we see) and absorbing OYGBIV

Refracted Light: Introduction Video

Discovery Ed video Refracted Light (1:44 minutes)

Refracted Light - Notes

All the colors of the visible spectrum travel at their own unique speed.

When light travels from one substance into another substance it changes speed and bends.

Light travels slower through water and glass than it does through air

Objects look broken or bent in water!

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Refracted Light - Notes

White light entering a glass prism can be refracted (or bent) and separated into the visible spectrum (ROYGBIV).

Colors refract (bend) at different angles because each color travels at different speeds.

Violet is bent the most and red is bent the least

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Refracted Light - Notes

White light through a prism = all seven colors refracted

The refracted spectrum can be bent again, with a second prism = back to white light!

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How do rainbows form?

Brain Pop Video“Rainbows”

Refracted Light - Notes

In nature, rainbows provide us with a beautiful spectrum

Rainbows occur when sunlight is refracted in small droplets of water.

The raindrops act like little water prisms that refract the light and form the rainbow.

Light Scattering

When light interacts with an object causing the light to be redirected in all directions

Light scattering = why the sky is blue during daytime and red and orange at sunrise and sunset

Molecules in the air scatter blue light the most when the sun is overhead

When is sun is rising or setting, we see red and orange colors because the blue light has been scattered out and away from our line of sight.

Write these notes!

Optical Illusion Video

http://www.youtube.com/watch?v=tVgOLWVYytM

The Human Eye

Discovery Ed video “The Human Eye” (2:17 minutes)

The Human Eye: Parts

The Human Eye:CorneaPupilLensRetinaOptic NerveBrain

Human Eye Diagram

Cow Eye Dissection

the box is a model of your eye. Light enters through the opening in the front of your eye (the iris) and passes through a crystalline lens. The lens focuses the light into an image that falls on your retina (the inside of the back of your eye). When an image falls on the retina, nerve cells send signals to your brain which are interpreted to create an image.

Listen to the video to find out these answers..

What does it mean for light to be reflected?What does it mean for light to be absorbed?

When light is taken in by a substance. This allows some colors to be taken in while other colors are reflected (these are the colors we see)

What does it mean for light to be refracted? When light travels from one substance into another substance it changes speed and bends.