Video Instruction

showmethephysics.com

Teachers' Domain, Infrared Gallery,
published October 21, 2005,  retrieved on April 2, 2009,
Resources

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

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
Spectrum © W. Bauer

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

Try this at home

Seeing invisible waves with your cellphone

Enrichment