1. Electromagnetic Radiation Mind Maps DUE TODAY!
STEP1: Complete & attach mini Reflection:
1) Overall work habit: G, S, N
2)This work shows I have a
Basic/Developing/Strong/Very Strong understanding because…………
STEP 2:Hand into front desk please
STEP 3: Complete TRAFFIC LIGHTS “BEFORE” Red.. Yellow. Green…

2. Chap 4: The Wave Model Waves transfer energy!
The characteristics of waves tell us about the amount of energy

3. What about when light hits new substances?

4. Chap 5: Light, Mirrors and lenses!

5. A change in the way something looks is often caused by the way that light bounces or bends!

13. How does light work?
Scientists use more than one model to explain the behaviour of light!
Sir Issac Newton…
Light is a stream of fast moving, tiny particles!
the
Particle Model
Particles travel in a straight line and get absorbed to make an image

14. In Chap 4, the wave model of light
helps explain ENERGY & COLOURS using frequency & wavelength
In chapter 5 we learn about the ray model of light!

15. The Ray Model of Light is very helpful when looking at how light behaves when it reflects off of mirrors and passes through lenses (refracts)

16. The Ray Model of Light
Light is drawn as a straight line with arrows to show direction
Useful to explain reflection, refraction & shadows!

17. Light & Matter
The type of MATTER in an object determines the amount of light it
ABSORBS, REFLECTS & TRANSMITS

18. Different materials can be classified as
Transparent
Translucent
Opaque
See Pg170!
-Give 2 points & Examples for Each

19. Let’s Experiment!
Use the ray box to shine 3 straight lines of light at a variety of objects
Observe what happens to the light & record
Classify the object & record:
opaque, transparent, translucent

20. Your Mission Today
1. Finish the experiments & draw 2 labelled ray diagrams (in pencil with a ruler!)
2. Use the old text book pg to finish the the handout.
3. Answer this Q at the bottom of your handout: Is a beaker of water with red food colouring transparent or translucent? Explain using the ray model of light!

21. 1. Transparent Light passes through freely
Very little light reflected or absorbed
Ex: air, water, window glass

22. 2. Translucent Most light gets through but is scattered
Cannot see objects clearly
Ex: frosted glass

23. 3. Opaque No light can pass through Only absorbs & reflects light
Ex: hand, book

24. Can You Classify each type of material ?b) c)

25. Shadows- pg 171
Ray diagrams can also show how SHADOWS are made and how
LARGE they will be
A shadow is made when an object blocks (absorbs) the light rays hitting it