Attempt this previous-year question. The correct option stays hidden until you choose.
of the following statements with regard to stealth technology is/are correct ?
1. Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.
2. Stealth objects can be detected using specific frequencies.
3. Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation. Select the answer using the code given below :
Pick an option to check yourself.
Approach: Analyze the core principles of stealth technology—minimizing detection signatures—and evaluate how materials interact with electromagnetic waves.
- **Correct Answer:** (c) 1 and 2 only
- **Statement 1 is correct:** Stealth technology aims to minimize the Radar Cross-Section (RCS) of an object. This is achieved through geometric shaping (to deflect radar waves away from the source) and the use of Radar Absorbing Materials (RAM) that convert radar energy into heat.
- **Statement 2 is correct:** Stealth is not absolute invisibility. Stealth objects are optimized for specific radar frequencies (typically high-frequency X-band). They remain vulnerable to detection by low-frequency radar (e.g., VHF/UHF) or multi-static radar systems that can pick up the object's signature.
- **Statement 3 is incorrect:** Metamaterials are engineered to manipulate electromagnetic waves to *minimize* or *cloak* an object by guiding waves around it (reducing scattering). Increasing scattering would make an object highly visible to radar, which is the opposite of the intended purpose of stealth technology.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
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