Electromagnetic Radiation 23 Jan

Class listSeating Plan

ELECTROMAGNETIC RADIATION!!!

23 Jan 2012

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Learning Objectives

• Be able to describe the different properties of Electromagnetic Radiation• That it behaves like a wave AND a particle• It’s speed– Level 5-7

• Be able to describe some of the ways that light interacts with things.

• Be able to describe what happens at a source, a medium and a detector.– Level 3-5

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Starter Questions

• Either agree or disagree with the following

• Hold up the green card in your planner for if you agree

• Hold up the red card in your planner if you disagree

You have 20 seconds to decide

Electromagnetic Radiation 23 Jan

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How do we tell how fast a car is travelling?

Electromagnetic Radiation 23 Jan

Class listSeating Plan

How do we tell how fast a wave is travelling

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Is light a wave or made of material

Electromagnetic Radiation 23 Jan

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As radiations go, what do you think Electromagnetic Radiation is made of?

Electromagnetic Radiation 23 Jan

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Light

Electromagnetic Radiation 23 Jan

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How EM radiation travels

• As a wave

• Also like a particle (packets called photons)

• At 300,000,000 m/s (Universal speed limit)

• Doesn’t need a medium(material) to travel through.

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same

= x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same

Speed = x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same

Speed = frequency x wavelength

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed Frequency

Wavelength20 = 2 x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed Frequency

Wavelength20 = 4 x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed Frequency

Wavelength20 = 5 x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed Frequency

Wavelength20 = 10 x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed Frequency

Wavelength20 = 20 x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed frequency wavelength

Constant = x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Since it’s a wave

• It has a frequency

• It has a wavelength

• Lets say the speed of a wave stays the same Speed frequency wavelength

Constant = x

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Electromagnetic Radiation 23 Jan

Class listSeating Plan

Learning Objectives

• Be able to describe the different properties of Electromagnetic Radiation• That it behaves like a wave AND a particle• It’s speed– Level 5-7

• Be able to describe some of the ways that light interacts with things.

• Be able to describe what happens at a source, a medium and a detector.– Level 3-5