1. P1 Energy & Waves Resources
P1 Physics
Mr D Powell

2. Connection
Connect your learning to the content of the lesson
Share the process by which the learning will actually take place
Explore the outcomes of the learning, emphasising why this will be beneficial for the learner
Demonstration
Use formative feedback – Assessment for Learning
Vary the groupings within the classroom for the purpose of learning – individual; pair; group/team; friendship; teacher selected; single sex; mixed sex
Offer different ways for the students to demonstrate their understanding
Allow the students to “show off” their learning
Consolidation
Structure active reflection on the lesson content and the process of learning
Seek transfer between “subjects”
Review the learning from this lesson and preview the learning for the next
Promote ways in which the students will remember
A “news broadcast” approach to learning
Activation
Construct problem-solving challenges for the students
Use a multi-sensory approach – VAK
Promote a language of learning to enable the students to talk about their progress or obstacles to it
Learning as an active process, so the students aren’t passive receptors

3. Quick Summary....

5. P1.1.1 Infrared radiation
a) All objects emit and absorb infrared radiation.
b) The hotter an object is the more infrared radiation it radiates in a given time.
c) Dark, matt surfaces are good absorbers and good emitters of infrared radiation.
d) Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation.
e) Light, shiny surfaces are good reflectors of infrared radiation.

6. Thermal Radiation Quick Questions1
Where does this planet get its energy from?   2
What does a prism do to white light?   3
What is the rough temperature of the surface of the sun?   4
What does thermal mean?   5
What is infra red radiation?  6
Why is infra red radiation captured by the atmosphere and not UV or visible   7
How can we reduce the greenhouse effect?   8
How can you tell if a metal is very hot   9
Do all objects give out thermal radiation   10
Do all objects absorb thermal radiation  

7. Thermal Radiation Quick Questions1
Where does this planet get its energy from?  
Sun 2
What does a prism to do white light?  
disperse it 3
What is the rough temperature of the surface of the sun?  
5500C 4
What does thermal mean?  
heat 5
What is infra red radiation? 
thermal radiation beyond visible red light 6
Why is infra red radiation captured by the atmosphere and not UV or visible  (A*-C)
it has a longer wavelength   7
How can we reduce the greenhouse effect?  
reduce emissions of certain gasses like methane, CO2 8
How can you tell if a metal is very hot  
glows brightly 9
Do all objects give out thermal radiation  
yes 10
Do all objects absorb thermal radiation  

8. M Seeing at Night Can you identify the objects?
Discuss with a partner which parts are hot parts compared to the cold parts?
Why might this be?

9. M Energy Movement Watch the FLV of the snapshots shown.
For each one explain what you are seeing in terms of energy transfers.
Pouring water
Thermometers
Breast Exams

10. Temperature & Colour Theory....
The main frequency (or colour) of emitted radiation increases as the temperature increases.
For example, a red hot object radiates most in the long wavelengths of the visible band, which is why it appears red. If it heats up further, the main frequency shifts to the middle of the visible band, and the spread of frequencies mentioned in the first point make it appear white.
We then say the object is white hot..

11. P
Order of Temperature
Sparkler
Light bulb
Ice water
Sun
Sunny day
Fire
In a team sequence these images into an order for which is hottest and which is coolest. Try and work out what the clues were

12. Order of Temperature Ice water 0 Sunny day 23 Sun 5500
Light bulb 247
Sparkler 
Fire 500

13. S
Groups?
In a team group these images to reflect their energy characteristics.
Elect a spokesperson to explain why you have done this!

14. M Theory of EM Radiation
EM radiation is produced by objects all the time even though they don’t appear to be doing much.
It is in fact internal energy from the object converted to either visible EM radiation i.e. ROY-G-BIV or non visible light Infra red.
It is the infra red part that makes them feel hot!

15. Absorption & Emission of EM Radiation
A perfect black object absorbs all the visible light and IR then emits the IR really well. It feels hotter to the touch
A perfect white object reflects all the colours and IR and UV radiation. It feels cooler to the touch.
A good example is white lines on our roads...or a t-shirt
Look at the demo of shiny v matt for visible light as an example!

16. M
Shiny or Dull Theory...
A mirrored surface reflects all the radiation striking it and absorbs none. Therefore a mirror cannot emit large amounts of radiation.
A matt dull surface absorbs more radiation due to cavities in the surface. (crevices)
A polished ring will be cooler than a dull one.
Extension TASK – Now answer the questions on page 213

17. Solar Panels
Now you have listened to your teacher explain how a solar panel works make up your own flowchart to explain the process (including diagrams).
Fill in as much detail as you can and use as many steps you as want!
Extension Task
Now imagine you science consultant who designed the panels got his science the wrong way around. What mistakes could he have made to make the panel useless!

18. M
Leslie Cube...
You an investigate the whole process by using a Leslie Cube...

19. Reflectors & Absorbers...
dark,matt
surfaces
5 mins
later
Dark matt surfaces emit (give out) more radiation…than light shiny surfaces at the same temperature.
5 mins later
light,shiny
surfaces

20. Reflectors & Absorbers...
5 mins
later
Dark matt surfaces are better absorbers (poorer reflectors) of radiation…than light shiny surfaces at the same temperatures.
dark,matt
surfaces
5 mins
later
light,shiny
surfaces

21. M
Emission experiment...
Four containers were filled with warm water. Which container would have the warmest water after ten minutes?
Shiny metal
Dull metal
Dull black
Shiny black
The __________ container would be the warmest after ten minutes because its shiny surface reflects heat _______ back into the container so less is lost. The ________ container would be the coolest because it is the best at _______ heat radiation.
shiny metal
radiation
dull black
emitting

22. Absorption experiment...
Four containers were filled with warm water. Which container would have the warmest water after ten minutes?
Shiny metal
Dull metal
Dull black
Shiny black
The __________ container would be the warmest after ten minutes because its surface absorbs heat _________ the best. The __________ container would be the coolest because it is the poorest at __________ heat radiation.
dull black
radiation
shiny metal
absorbing

23. P Dull Black Car Shiny Black Car Brushed Steel Car Shiny Steel Car
Decisions
See if you can you sort these in the correct order of which would be the best absorbers of heat....
Shiny Black Car
Shiny Steel Car
Dull Black Car
Brushed Steel Car
Dull Black Car
Shiny Black Car
Brushed Steel Car
Shiny Steel Car

24. Question 1
matt surfaces
shiny surfaces
particles
Infra red

25. Consolidate – How can you explain these things...
a) All objects emit and absorb infrared radiation.
b) The hotter an object is the more infrared radiation it radiates in a given time.
c) Dark, matt surfaces are good absorbers and good emitters of infrared radiation.
d) Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation.
e) Light, shiny surfaces are good reflectors of infrared radiation.
P1.1.1 Infrared radiation