Question

select the correct answer.
which electromagnetic wave has wavelengths ranging from the size of a printed period to the length of a pen ($1 \times 10^{-3}$ to $1 \times 10^{-1}$ meters)?

\\(\bigcirc\\) a. microwaves
\\(\bigcirc\\) b. radio waves
\\(\bigcirc\\) c. infrared radiation
\\(\bigcirc\\) d. x-rays

Explanation:

To determine the correct electromagnetic wave, we analyze the wavelength ranges:

• Microwaves: Have wavelengths typically from about \(1\times10^{-3}\) m (1 millimeter) to \(1\times10^{0}\) m (1 meter). The given range (\(1\times10^{-3}\) to \(1\times10^{-1}\) m) falls within this.
• Radio waves: Have much longer wavelengths (e.g., meters to kilometers), so they don't match.
• Infrared radiation: Has wavelengths from about \(7\times10^{-7}\) m to \(1\times10^{-3}\) m, which is shorter than the lower bound of the given range.
• X - rays: Have very short wavelengths (on the order of \(1\times10^{-10}\) m or smaller), far from the given range.

So the electromagnetic wave with wavelengths in the range \(1\times10^{-3}\) to \(1\times10^{-1}\) meters is microwaves.

Answer:

A. microwaves