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An electromagnetic wave traveling through space encounters an electron sitting a

ID: 1291271 • Letter: A

Question

An electromagnetic wave traveling through space encounters an electron sitting at rest. Upon being hit by the wave, which way will the electron move?

It will bob up and down with the crests and troughs

It'll be pushed entirely along the direction the wave is moving (perpendicular to the crests and troughs)

It won't move at all

It'll both bob up and down and be pushed along the direction the wave is moving

Suppose, for the sake of argument, that instead of scattering blue light, the air scattered green light. What color would the Sun look to the human eye (remember: the sunlight hitting the top of the Earth's atmosphere is close to white in color)? A. Bluish B. Reddish C. Purplish (magenta) D. Black

Suppose, for the sake of argument, that instead of scattering blue light, the air scattered only infrared light. What color would the SKY look like to the human eye?

It would look Red

It would still look Blue

It would look Black

It would look White

A.

It will bob up and down with the crests and troughs

B.

It'll be pushed entirely along the direction the wave is moving (perpendicular to the crests and troughs)

C.

It won't move at all

D.

It'll both bob up and down and be pushed along the direction the wave is moving

Explanation / Answer

D. The electric field causess up and down motion and the magnetic field causes to and fro motion.

C. Purplish ( Magenta). The sun's color will be the complementary color of the scattered light. Complimentry color for blue is yellow.

C. It would look black. You eyes observe the scattered light and because you cannot see infrared light, it will appear to be dark, hence black.

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