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Line 119: − * '''Evaluation (Questions for assessment of the child)''' − Draw a ray diagram to show how this theory explains reflection. − * '''Question Corner''' − − ===Activity No # 1C - Corpsucular Theory of Light === − {| style="height:10px; float:right; align:center;" − |<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;"> − ''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div> − |} − The objective is to study Newton's theory on light − * '''Estimated Time''' - 30 minutes − * '''Materials/ Resources needed''' − Computer, projector, power − * '''Prerequisites/Instructions, if any''' − * '''Multimedia resources''' − {{#widget:YouTube|id=uO2uyvf-E3k}} − * '''Website interactives/ links/ simulations''' − * '''Process (How to do the activity)''' − Watch the video and discuss with the student their understanding. − * '''Developmental Questions (What discussion questions)''' − #Can reflection and refraction be explained using this? How? − #Newton said that different colours can be caused by different sizes of particles. Knowing what you know of the eye, explain how this would have worked. − #What do you not understand about this theory based on your observations? Line 175:
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no edit summary
#The higher the frequency the higher the energy; this is seen as different colours of the visible spectrum
#The higher the frequency the higher the energy; this is seen as different colours of the visible spectrum
#Can we break down these seven colours more? (No; demonstrate with a prism; these are pure colours)
#Can we break down these seven colours more? (No; demonstrate with a prism; these are pure colours)
* '''Evaluation (Questions for assessment of the child)'''
* '''Evaluation (Questions for assessment of the child)'''
Draw a ray diagram to show how this theory explains reflection.
Draw a ray diagram to show how this theory explains reflection.
Computer, Projector, Blackboard
Computer, Projector, Blackboard
* '''Prerequisites/Instructions, if any'''<br>
* '''Prerequisites/Instructions, if any'''<br>
Students must have done simple optics experiments on reflection and refraction.
* '''Multimedia resources'''
* '''Multimedia resources'''
* '''Website interactives/ links/ simulations'''
* '''Website interactives/ links/ simulations'''
{|class="wikitable"
{|class="wikitable"
|-
|[[File:particle_refraction.png|300px|link=http://www.olympusmicro.com/primer/java/refraction/refractionangles/index.html]]
|[[File:particle_reflection1.png|300px|link=http://www.olympusmicro.com/primer/java/reflection/reflectionangles/index.html]]
|-
|-
|[[File:Reflection_and_refraction.png|300px|link=http://www.olympusmicro.com/primer/java/reflection/huygens/index.html]]
|[[File:Reflection_and_refraction.png|300px|link=http://www.olympusmicro.com/primer/java/reflection/huygens/index.html]]
Observe the student response to above questions
Observe the student response to above questions
* '''Question Corner'''
* '''Question Corner'''
==Concept #3 - Particle Nature of Light ==
===Learning objectives===
#One of the early theories of light was that light is made of particles
#Particle theory explains reflection and refraction; light travels in a straight line of particles
#Particle theory (corpuscular theory) did not explain diffraction especially at small, microscopic scale
#Discovery of photoelectric Effect provided the evidence for particle nature when all evidence was showing that light was a wave
===Notes for teachers===
The view among scientists on light was split between wave and particle nature of light. Issac Newton proposed his corpuscular theory while Christian Huygens proposed that light is a wave. Reflection and refraction can be explained using particle theory of light and geometric optics supported the particle theory of light.
Click [http://karnatakaeducation.org.in/KOER/en/index.php/Light_as_energy here] for more notes on the nature of light, visible light and colours.
===Activity No # 1 - Corpsucular Theory of Light ===
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
The objective is to study Newton's theory on light
* '''Estimated Time''' - 30 minutes
* '''Materials/ Resources needed'''
Computer, projector, power
* '''Prerequisites/Instructions, if any'''
* '''Multimedia resources'''
{{#widget:YouTube|id=uO2uyvf-E3k}}
* '''Website interactives/ links/ simulations'''
* '''Process (How to do the activity)'''
Watch the video and discuss with the student their understanding.
* '''Developmental Questions (What discussion questions)'''
#Can reflection and refraction be explained using this? How?
#Newton said that different colours can be caused by different sizes of particles. Knowing what you know of the eye, explain how this would have worked.
#What do you not understand about this theory based on your observations?
* '''Evaluation (Questions for assessment of the child)'''
Draw a ray diagram to show how this theory explains reflection.
* '''Question Corner'''
===Activity No # 2- Reflection, Refraction and Diffraction as particles===
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
* '''Estimated Time''' - 45 minutes
* '''Materials/ Resources needed'''
Computer, projector, power
* '''Prerequisites/Instructions, if any'''
Students must have done simple optics experiments on reflection and refraction.
* '''Multimedia resources'''
* '''Website interactives/ links/ simulations'''
[[File:particle_reflection.png|300px|link=http://www.olympusmicro.com/primer/java/particleorwave/refraction/index.html]]
* '''Process (How to do the activity)'''
* '''Developmental Questions (What discussion questions)'''
* '''Evaluation (Questions for assessment of the child)'''
* '''Question Corner'''
===Notes for teachers===
Studies done on how light travels has helped us visualise it now as changing electrical magnetic fields that interact with other material objects as packets of energy. This radiation can be thought of as waves of different wavelengths. The waves are not of material objects but travelling waves changing electric and magnetic fields. Different wavelengths are associated with different energy levels and different kind of radiation.
Click [http://karnatakaeducation.org.in/KOER/en/index.php/Light_as_energy here] for more notes on the nature of light, visible light and colours.
==Concept # 3- Dual Nature of Light==
==Concept # 3- Dual Nature of Light==