Electromagnetism and Spectroscopy

Speed of Light

Maxwell unified electricity and magnetism and predicted that there are waves that travel at a constant speed of different frequencies that are propagated by oscillating magnetic and electric fields.

So, how do we measure it?

https://www.youtube.com/watch?v=YMO9uUsjXaI

Drag and Drop

Fizeau's experiment was to ​

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Drag these tiles and drop them in the correct blank above

determine the speed of light

determine the angular velocity of light

to see whether he could block light

Reorder

Reorder the following in chronological order

• Romer

• Fizeau

• Foccault

• Rosa and Dorsey

• Evansen

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

A note about Hertz

https://www.youtube.com/watch?v=QZXYFr5YHew

Watch the video carefully, and answer the questions that follow

Multiple Select

Maxwell's contribution to EMR was

• he predicted that EM waves other than light existed

• light was an EM wave

• light was an electromagnetic disturbance

• visible light had a specific wavelength

Multiple Select

Hertz found that radiowaves

• travelled in straight lines

• could be reflected

• had a certain wavelength

• waves could be blocked

​Now some things about spectroscopy!

https://www.youtube.com/watch?v=NqUPEnbrz44