Question

The wavelength range of the electromagnetic waves suitable for radar systems used in aircraft navigation is

• A. \(0.1\ \mathrm{m}\) to \(1\ \mathrm{mm}\)
• B. \(700\ \mathrm{nm}\) to \(400\ \mathrm{nm}\)
• C. \(300\ \mathrm{nm}\) to \(10\ \mathrm{nm}\)
• D. \(1\ \mathrm{nm}\) to \(10^{-3}\ \mathrm{nm}\)

Hint:

Radar systems use \[ \boxed{\text{Microwaves}} \] because they can travel long distances, penetrate clouds, and can be reflected effectively by aircraft and other objects.

Answer 1

The Correct Option is A

Step 1: Identify the electromagnetic waves used in radar. Radar systems used in aircraft navigation operate using \[ \boxed{\text{Microwaves}.} \]

Step 2: Recall the wavelength range of microwaves. The wavelength range of microwaves is approximately \[ 0.1\ \mathrm{m} \text{ to } 1\ \mathrm{mm}. \] This range is suitable for long-distance transmission with minimum atmospheric absorption.

Step 3: Write the answer. Hence, \[ \boxed{0.1\ \mathrm{m}\text{ to }1\ \mathrm{mm}}. \] Thus, \[ \boxed{(A)} \] is the correct answer.