Q1. Consider the following statements regarding Aditya-L1 and its instruments:
- SUIT observes the Sun primarily in the near-ultraviolet region and studies the upper photosphere and chromosphere.
- SoLEXS is designed to observe high-energy X-rays associated with the most energetic solar processes.
- HEL1OS observes high-energy X-rays from energetic solar processes.
- The location of Aditya-L1 near the Sun–Earth L1 point enables continuous solar observations without being placed in a low-Earth orbit.
How many of the above statements are correct?
(a) Only one
(b) Only two
(c) Only three
(d) All four
Answer: (b) Only two
Explanation:
- Statement 1 — Correct: SUIT observes the Sun in 11 near-ultraviolet filters and studies the upper photosphere–chromosphere region.
- Statement 2 — Incorrect: SoLEXS observes low-energy X-rays, as indicated by its name.
- Statement 3 — Correct: HEL1OS observes high-energy X-rays from energetic solar phenomena.
- Statement 4 — Incorrect: Aditya-L1 is placed in a halo orbit around the Sun–Earth L1 point, not simply “near” L1 in a way that means it has no orbit; its location provides a relatively uninterrupted view of the Sun.
