Following are the wavelength of some constituents of the electromagnetic spectrum. The wavelength range that are used in Radar system for Aircraft navigation is:

(A) 1 mm to 700 nm
(B) 0.1 m to 1 mm
(C) 400 nm to 1 nm
(D) $< 10^{-3}$ nm
(E) >1 m

Choose the correct answer from the options given below:

(B) only

The correct answer is Option (2) → (B) only

Radar system, especially those used for aircraft navigation, typically operate in the microwave range of the electromagnetic spectrum. The wavelengths used for Radar systems generally fall between 0.1m and 1mm, which corresponds to ultra frequency range.