EMR

Question 1

James Clerk MAXWELL

Answer 1

Came up with the theory of EMR

• EMR is created by an accelerating charge
• the greater the acceleration, the higher the energy ad frequency of the EMR and the shorter the wavelength
• EMR is a transverse wave
• EMR has a changing magnetic field component and a changing electric field component
• the electric field of the EMR produces a magnetic field perpendicular to the direction the wave propagates

Question 2

Heinrich HERTZ

Answer 2

Experimented and created an apparatus from Maxwell’s theory, came up with the HERTZ apparatus

Question 3

MARCONI

Answer 3

Took the Hertz apparatus and sold it commercially and created the first transatlantic signal. Radios.

Question 4

MICHELSON *

Answer 4

Measured the speed of light using 8 sided mirrors. Better results of the mirror experiment.

198

Question 5

Olaf ROMER *

Answer 5

Came up with the first estimation of the speed of light using Jupiter and Io’s eclipse.

198

Question 6

Armand FIZEAU

Answer 6

First terrestrial determination of the speed of light. Rotating wheel with cogs and a mirror.

196

Question 7

FOUCAULT *

Answer 7

Rotating plane mirror

197

Question 8

POLAROID

Answer 8

Created polarized sunglasses.

Question 9

Thomas YOUNG

Answer 9

Had light diffract and interfere to show that light is a wave by having it diffract and interfere.