Question

Radar works by sending out electromagnetic energy at a particular wavelength and receiving a reflected signal from distant objects, similar to a sound echo. Many modern military aircraft have what is known as “stealth technology” that allows the aircraft to be invisible to enemy radar. What statement best explains how this is possible?

A. The coating on the aircraft is highly reflective.


B. The coating on the aircraft absorbs incoming light energy.


C. The aircraft is extremely fast, allowing it to outrun the enemy radar.


D. The aircraft has a very rounded shape that refracts incoming light energy.

Answer 1

The correct option is B

Step-by-step explanation:

Ordinary aircrafts are coated with materials that are highly reflective; reflecting incoming electromagnetic signal/wave/energy back to the radar antenna. The round shape of ordinary aircrafts also does the same thing. However, stealth technology uses coatings that absorbs radiated energy (instead of reflecting it) and converts it to heat. It also changes the rounded shape of aircrafts into flat surfaces with very sharp edges which reflects waves in directions away from the radar antenna.