1. 11.4 The Ray Model of Light

2. Group Activity:  In groups of 4, determine a way to “group” the materials given by your teacher. When deciding how to group them, think about light and how each object with interact with it. Check in with the teacher once you have made your decision. When the teacher gives you the OK, record your reasoning  Glass beakerBook  Tissue paperPlastic cup  Red plastic cupClear plastic portions cup  Zip Loc bagSmall Tupperware dish  Wax paperConstruction paper  Playing cardPlastic paper sleeve

3. Light Ray  A line and arrow representing the direction and straight-line path of light

4. Properties of Light  When light strikes matter, it can be… 1. Transmitted – light passes through a substance 2. Reflected – light bounces off an object 3. Absorbed – light is absorbed by object and converted to heat

5.  Matter can be classified as:  Transparent  Transmits all or almost all incident light, object can clearly be seen through material  Ex. Clear glass

6.  Matter can be classified as:  Translucent  transmits some incident light but absorbs or reflects the rest, objects are not clearly seen through material

7.  Matter can be classified as:  Opaque  Does not transmit any incident light, it either absorbs the light or reflects it. Objects are not seen through material

8. Try this:  Classify each of these materials as transparent, translucent or opaque :  A textbook  Frosted glass  A single sheet of tissue paper  A clean sheet of glass  A rock  Apple juice  Sunglasses

9. Try this:  Classify each of these materials as transparent, translucent or opaque:  A textbook- OPAQUE  Frosted glass- TRANSLUCENT  A single sheet of tissue paper- TRANSLUCENT  A clean sheet of glass- TRANSPARENT  A rock- OPAQUE  Apple juice- TRANSLUCENT  Sunglasses- TRANSPARENT

10. Create a Flow Chart  In your group, create a flow chart to describe the three things that can happen when a light ray hits an object

11. Colour of Opaque Objects  White light his an opaque object and all the colours of the spectrum are absorbed except one

12. Seat Work:  Read through pg 116-117  Complete pages 118-121  Complete Pg 293 in textbook