An Electromagnetic Wave Is Propagating Towards the West in Free

question 23

Multiple Choice

An electromagnetic wave is propagating towards the west in free space.At a certain moment the direction of the magnetic field vector associated with this wave points vertically upward.What is the direction of the electric field vector?

• A)horizontal and pointing south
• B)vertical and pointing down
• C)horizontal and pointing north
• D)vertical and pointing upward
• E)horizontal and pointing east

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Definitions:

Ventral Motor Root

The part of a spinal nerve that carries motor signals from the spinal cord to the body, controlling muscle movements.

Filum Terminale

A slender fibrous tissue thread that extends from the apex of the conus medullaris to anchor the spinal cord in the lower vertebral canal.

Thecal Sac

The protective covering of the spinal cord and its nerve roots, filled with cerebrospinal fluid.

Conus Medullaris

The tapered, lower end of the spinal cord that occurs near the first and second lumbar vertebrae.