Teachers' Domain, Infrared Gallery,
published October 21, 2005,  retrieved on April 2, 2009, http://www.teachersdomain.org/resource/

Electromagnetic Radiation - waves of energy generated by the acceleration of charges

Why can't neutrons make this kind of wave?

Have no charge

- travel at the speed of light in a vacuum

3 x 108 m/s

Electromagnetic Wave
Santa Barbara City College

NASA - Electromagnetic Waves

Charges "shake" off their energy

in waves when they vibrate

Vibrating Charges &
Electromagnetic Waves
Physics 2000

3d Electromagnetic Wave
- David M. Harrison

3d Electromagnetic Wave # 2
- David M. Harrison

- Wavelength and Frequency

Conversion of a DICOM-format X-ray from a ten year old male showing polydactyly. This is the patient's left hand, posterior-anterior projection. Identifying tags and such have been stripped. en:User:Drgnu23, subsequently altered by Grendelkhan, Raul654, and Solipsist.

 In the late 40's & early 50's, an x-ray unit was a common shoe store sales promotion device. They were finally banned in the US in 1970.    Source - Museum of quackery

Meet the Pedoscope

Source - Museum of Quackery - Bob McCoy

Which wave has the
smallest wavelength?

(hint: most penetrating)

Gamma Rays,

X-Rays

Which wave has the
smallest frequency?

Which Color Has the
Greatest Wavelength?

Red

Smallest Wavelength?

Violet

Which color of light has a
frequency of 6.0 x 1014  Hz?

Green

What is the frequency

of light whose wavelength

is 6 x 10-7 m?

v = fl

3x108 m/s = f[6 x 10-7 m]

f = 5  x 1014 Hz

What color?

Orange

Lasers, Frequency, &  Wavelength
Physics 2000

Sonar is used to map the oceans

Charles Sol
Enseignant Université Marne la Vallée

Try this at home

Seeing invisible waves with your cellphone

Enrichment

Microwaves, Standing Waves