Summary

• Electromagnetic waves are waves that consist of vibrating electric and magnetic fields.
• The electric and magnetic fields of an electromagnetic wave are areas of electric or magnetic force.
• An electromagnetic wave begins when an electrically charged particle vibrates.

## What is the speed of electromagnetic waves in vacuum?

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the “speed of light”; nothing can move faster than the speed of light.

## What is the basic source of electromagnetic waves?

The fundamental source of electromagnetic radiation is oscillating electric charges, which emit oscillating electric and magnetic fields.

## What are two kinds of fields that make up an electromagnetic wave quizlet?

An electromagnetic wave is made up of vibrating electric and magnetic fields that move through space or some medium at the speed of light. You just studied 57 terms!

## What is the difference between frequency and time period of a wave?

The crucial difference between period and frequency is that period is the duration in which a complete wave cycle is achieved. As against frequency is the number of complete cycles of a wave occurring in a specific amount of time.

## What is the relation between time period and frequency of a wave?

Sound | Short/Long Answer Questions The number of times a cycle is completed in a second is the frequency. The time taken to complete one vibration is called time period. Frequency and time period is inversely proportional, the number of vibrations per second is frequency.

## What is the relation between time period and frequency of an oscillating body?

Periodic motion is a repetitious oscillation. The time for one oscillation is the period T. The number of oscillations per unit time is the frequency f. These quantities are related by f=1T f = 1 T .

## What is the relation between frequency and angular frequency?

Its units are therefore cycles per second (cps), also called hertz (Hz). Angular frequency (ω), also known as radial or circular frequency, measures angular displacement per unit time. Its units are therefore degrees (or radians) per second. Hence, 1 Hz ≈ 6.28 rad/sec.

## What is the relationship between velocity and frequency?

Frequency is a fundamental characteristic of a wave. It is the measure of the number of waves passing through a point in a unit time. The velocity of a wave is the distance travelled by a point on the wave. In general, for any wave the relation between Frequency and Velocity is proportionate.

## Why do we use angular frequency?

Angular frequency (ω), also known as radial or circular frequency, measures angular displacement per unit time. Its units are therefore degrees (or radians) per second. so when an object rotates or move in circular path, we measure the rate at which it completes its cycle.