**28. WJAB (90.9 FM) Overview**WJAB (90.9 FM) is a National Public Radio-affiliated college radio station located on the campus of Alabama A&M University. It primarily features jazz and blues music programming aimed at African-American residents of the northern counties of Alabama. **Questions to Consider:**- What is the period of these radio waves?- What is its wavelength? The image is a diagram of the electromagnetic spectrum, illustrating both frequency and wavelength ranges for different types of electromagnetic waves.### Diagram Explanation:1. **Frequency (f) and Wavelength (λ):** - The top part of the diagram shows the increasing frequency (f, measured in Hertz, Hz) from 10² Hz to 10²⁴ Hz. - The bottom part shows the decreasing wavelength (λ, measured in meters, m) from 10⁶ m to 10⁻¹⁴ m.2. **Types of Waves:** - **Radio Waves:** - Low frequency, long wavelength. - Used in AM and FM radio, TV broadcasts, and radar. - **Microwaves:** - Used in microwave ovens and radar technology. - **Infrared:** - Lies between microwaves and visible light. - Associated with heat radiation. - **Visible Light:** - Ranges approximately from 700 nm (red) to 400 nm (violet). - The spectrum is expanded at the bottom, showing the colors: red, orange, yellow, green, blue, indigo, and violet. - **Ultraviolet (UV):** - Higher frequency than visible light. - Can cause skin tanning and is used in sterilization. - **X-rays:** - Used in medical imaging. - Can penetrate soft tissue but are absorbed by denser materials like bones. - **Gamma (γ) Waves:** - High frequency, short wavelength. - Emitted in nuclear reactions and by radioactive atoms. - Used in cancer treatment due to their ability to kill cells.This diagram serves as a comprehensive representation of the electromagnetic spectrum, showing how different types of electromagnetic waves vary in terms of frequency and wavelength and their common applications.

We are given radio waves. These are FM radio waves. The time period is related to frequency as T=1f…

Answered: 28. WJAB (90.9 FM) is a National Public…

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