UPSC CSE Prelims
Question 84
Which of the following statements with regard to stealth technology is/are correct?
- Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.
- Stealth objects can be detected using specific frequencies.
- Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation.
Select the answer using the code given below:
View correct answer and explanation
Correct answer: C
Correct Option: C
Explanation: Stealth technology reduces the radar cross-section using shape and radar-absorbing materials, but it does not make aircraft invisible at all wavelengths.
Statement-wise Analysis:
Statement 1: Correct - Shaping and radar-absorbing coatings reduce reflected radar signals.
Statement 2: Correct - Some frequency bands and sensor arrangements can detect targets despite reduced radar cross-section.
Statement 3: Incorrect - Metamaterials, where used, aim to redirect/absorb or control scattering rather than increase detectable scattering.
Option-wise Analysis:
A: Incorrect - Omits supported item(s) 2.
B: Incorrect - Includes unsupported item(s) 3 and omits supported item(s) 1.
C: Correct - This option includes the supported item(s) and excludes the unsupported ones.
D: Incorrect - Includes unsupported item(s) 3.