Electromagnetic Radiation

 ಕನ್ನಡದಲ್ಲಿ ನೋಡಿ

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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 =

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.

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 Interactive Simulations on Radio Waves and Electromagnetic Waves Radio and Electromagnetic Waves Evaluation question
 * Estimated Time
 * Materials/ Resources needed Downloaded video, DVD player/ Computer and projector
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ simulations
 * Process (How to do the activity)
 * Developmental Questions (What discussion questions)
 * Evaluation (Questions for assessment of the child)

Questions:-Electromagnetic Spectrum

What is the electromagnetic spectrum? What are the characteristics of electromagnetic waves? How are these waves created and detected?

Source:Electromagnetic Spectrum -School for Champions

Questions:-Visible Light

How is visible light detected? What are its main characteristics? How is light created?

Source:Visible Light-School for Champions

Questions:-X-Rays

How where x-rays discovered? How are the created and detected? How are x-rays used?

Source:X-Rays-School for Champions


 * Question Corner

Activity No 1#Explain Difference between electromagnetic waves and Mechanical Waves
This video explains about difference between electromagnetic waves and mechanical waves.How to transfer all energy from one place to another Source:Youtube Interactive simulations of electromagnetic wave Wave on a string
 * Estimated Time
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 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ simulations


 * Process (How to do the activity)
 * Developmental Questions (What discussion questions)
 * Evaluation (Questions for assessment of the child)
 * Question Corner

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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 * Multimedia resources
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 * Question Corner

Activity No 3# Electromagnetic Waves and Radiation

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 * Developmental Questions (What discussion questions)
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 * Question Corner

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