Answer:
5. Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
6. A wave carries energy from a source to a point some distance away. A wave is reflected by a barrier. The reflected wave moves away from the barrier at an angle that is equal to the angle with which the incoming wave moved towards the barrier. When a wave is slowed down, it refracts—that is, changes direction.
7. electromagnetic waves – eg light waves, microwaves, radio waves.
8. Wave Period: The time it takes for two successive crests (one wavelength) to pass a specified point. The wave period is often referenced in seconds, e.g. one wave every 6 seconds.
9. Amplitude - One-half the wave height or the distance from either the crest or the trough to the still-water line. Depth - the distance from the ocean bottom to the still-water line. Direction of Propagation - the direction in which a wave is travelling.
10. Undisturbed surface - resting state or equilibrium position of medium in the absence of a wave. Period - the time it takes for successive crests or troughs to pass a specific point.
Explanation:
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