Questions: 9. Answer the following questions about the image in Figure 1 a. Define an Electromagnetic (EM) wave. b. How many cycles are represented for the EM wave? c. If the period of the EM wave is 7.14 × 10^-8 seconds, what is its frequency? d. State the Principle of Electromagnetism illustrated in Figure 1

9. Answer the following questions about the image in Figure 1 a. Define an Electromagnetic (EM) wave. b. How many cycles are represented for the EM wave? c. If the period of the EM wave is 7.14 × 10^-8 seconds, what is its frequency? d. State the Principle of Electromagnetism illustrated in Figure 1
Transcript text: 9. Answer the following questions about the image in Figure 1 a. Define an Electromagnetic (EM) wave. b. How many cycles are represented for the EM wave? c. If the period of the EM wave is $7.14 \times 10^{-8}$ seconds, what is its frequency? d. State the Principle of Electromagnetism illustrated in Figure 1
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Solution

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Solution Steps

Step 1: Define an Electromagnetic (EM) wave

An electromagnetic wave is a disturbance that travels through space by the interplay of mutually perpendicular, oscillating electric and magnetic fields. These fields are perpendicular to the direction of wave propagation, forming a transverse wave. EM waves can travel through a vacuum and carry energy.

Step 2: Determine the number of cycles represented

Two complete cycles of the EM wave are shown in Figure 1. One cycle is a complete oscillation of both the electric and magnetic fields.

Step 3: Calculate the frequency

The frequency (f) of a wave is the reciprocal of its period (T). Given a period T = 7.14 x 10⁻⁸ seconds, the frequency is calculated as follows:

f = 1/T = 1/(7.14 x 10⁻⁸ s) ≈ 1.4 x 10⁷ Hz

Final Answer:

a. An EM wave is a transverse wave consisting of oscillating electric and magnetic fields perpendicular to each other and the direction of propagation. b. Two cycles. c. 1.4 x 10⁷ Hz.

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