Electromagnetic Radiation

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Additional information

Useful websites

1. http://en.wikipedia.org/wiki/Electromagnetic_radiation
2. http://chemwiki.ucdavis.edu/Physical_Chemistry/Spectroscopy/Fundamentals/Electromagnetic_Radiation Click here : Waves and charateristics
3. http://en.wikipedia.org/wiki/Radiation#Notes_and_references Click here : About Radiation notes and references
4. http://www.school-for-champions.com/science/electromagnetic_waves.htm#.U05YjGYvnzo -Electromagnetic Spectrum
5. http://www.school-for-champions.com/science/light.htm -VisibleLight
6. http://www.school-for-champions.com/science/xrays.htm -X-Rays

Reference Books

• Refer 9th standard Science TamilNadu textbook from the following link page no 255- 340 Click here

Teaching Outlines

Concept # Introduction to Electromagnetic Radiation

Learning objectives

1. Terms related to Wave Motion
2. Terms related to Elcetromagnetic Wave
3. Distinguish between Mechanical Wave and Electromagnetic wave

Notes for teachers

These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.

Activity No # Electromagnetic Waves

1. Play with a bar magnet and coils to learn about Faraday's law.
   
2. Move a bar magnet near one or two coils to make a light bulb glow.
   
3. View the magnetic field lines or use a meter to show the direction and magnitude of the current.
   
4. Play with electromagnets, generators and transformers.

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This video explains about electromagnetic waves Electromagnetic radiation is self sustaining energy with electric and magnetic field components. It is commonly referred to as 'light' also known As: light, EMR, EM radiation, electromagnetic waves

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Interactive Simulations on Radio Waves and Electromagnetic Waves Radio and Electromagnetic Waves

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       Evaluation question 

             Questions:-Electromagnetic Spectrum 

                 What is the electromagnetic spectrum?

                 What are the characteristics of electromagnetic waves?

                 How are these waves created and detected?

             Questions:-Visible Light 

                 How is visible light detected?

                 What are its main characteristics?

                 How is light created?

             Questions:-X-Rays 

                 How where x-rays discovered?

                 How are the created and detected?

                 How are x-rays used?

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Activity No 1#Explain Difference between electromagnetic waves and Mechanical Waves

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This video explains about difference between electromagnetic waves and mechanical waves.How to transfer all energy from one place to another

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Interactive simulations of electromagnetic wave
Wave on a string

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Concept #Properties and Ranges of Electromagnetic Waves

Learning objectives

1. General Properties of Electromagnetic Waves
2. Seven broad ranges of Electromagnetic Waves
3. Method of producing different ranges of Electromagnetic Waves
4. Recognize that visible light is a part of Electromagnetic Radiations
5. Uses of Electromagnetic Waves

Notes for teachers

These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.

Activity No 2# Producing of Waves

1. Take about 30cm of Insulated copper wire
2. Use the wire from an old transformer or motor
3. Wind it around a pencil stick
4. Pass current through the wire from a single pentorch cell
5. A magnetic field is produced around the coil
   

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Activity No 3# Electromagnetic Waves and Radiation

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