Question

comparing regions of the electromagnetic spectrum
which has the longest wavelength?
highest frequency?
infrared
microwaves
visible
x - rays

Explanation:

Step1: Recall the relationship between wavelength and frequency

In the electromagnetic spectrum, wavelength and frequency are inversely related ($\lambda=\frac{c}{f}$, where $c$ is the speed of light). As the wavelength increases, the frequency decreases.

Step2: Analyze the position in the spectrum

Looking at the electromagnetic spectrum diagram (Gamma ray $\to$ X - rays $\to$ Ultraviolet $\to$ Visible $\to$ Infrared $\to$ Microwave $\to$ Radio), the longer the wavelength, the lower the frequency. Among the given options (infrared, microwaves, visible, X - rays), microwaves are to the right (longer wavelength side) compared to infrared, visible, and X - rays. For frequency, since wavelength and frequency are inversely related, X - rays (on the left side of the spectrum among the given options) have the highest frequency.

Answer:

Longest wavelength: microwaves; Highest frequency: X - rays