How many aquanauts is the Matsya submersible designed to carry?
- A.Two
- B.Three
- C.Four
- D.Six
Correct answer
Explanation
The correct answer is three. The submersible of the Samudrayaan Mission is built to take three aquanauts down to depths between five and six thousand metres, and it is the vehicle behind the plan for a crewed Indian dive later this decade. The other counts are distractors and were not stated. Candidates often confuse the crew size with the depth figures, so keep the two separate: three aquanauts, and a design depth range of five to six thousand metres. Remember also that the trial capability at this depth belongs to the National Institute of Ocean Technology at Chennai, that the trials are conducted in the Central Indian Ocean Basin, and that the Ocean Mineral Explorer is the system used for high-resolution exploration of hydrothermal sulphide deposits, several of which have already been identified.
Read the full article: India Plans First Human Deep-Sea Mission to 6,000 m by 2028
Practice Questions
According to Dr Jitendra Singh at IPRD 2026, by which year will India send its first human deep-sea mission to a depth of up to 6,000 metres?
- A.2026
- B.2027
- C.2028
- D.2030
Show answer
The Minister said India is progressing towards sending its first crewed deep-sea mission to a depth of as much as six thousand metres by that year, which he called an important milestone in an exploration programme built on indigenous capability.
Read the full explanation →Which principle did Dr Jitendra Singh propose as the guide for Indo-Pacific cooperation in ocean science?
- A.One Ocean, Shared Knowledge and Equitable Prosperity
- B.One Earth, One Family, One Future
- C.Security and Growth for All in the Region
- D.Blue Economy for Shared Wealth
Show answer
The Minister offered this as the principle that should steer cooperation across the Indo-Pacific, arguing that oceans ignore political boundaries and that marine pollution or a change in ocean temperature has effects far beyond the country where it begins.
Read the full explanation →Over which frequency range were the JNCASR terahertz devices measured?
- A.24 to 40 GHz
- B.110 to 170 GHz
- C.310 to 360 GHz
- D.600 to 750 GHz
Show answer
Measurements across this band agreed closely with the simulations the team had run, and in the power splitter the two output signals were nearly identical, showing that the engineered barrier had little effect on transmission.
Read the full explanation →The silicon photonic crystal used in the JNCASR work was patterned to mimic the lattice of which material?
- A.Diamond
- B.Graphene
- C.Gallium nitride
- D.Sapphire
Show answer
The team designed a silicon photonic crystal whose structure mimics the honeycomb lattice of graphene, arranging triangular holes in a silicon slab so that terahertz waves travel along the boundary between two regions of the crystal.
Read the full explanation →Which institute developed the silicon chip that carried terahertz data at 100 Gbit/s across an engineered barrier?
- A.Indian Institute of Science, Bengaluru
- B.Jawaharlal Nehru Centre for Advanced Scientific Research
- C.Saha Institute of Nuclear Physics, Kolkata
- D.Centre for Development of Telematics
Show answer
Its team, led by Dr Abhishek Kumar of the Meta Optics Laboratory, used topological photonics to show terahertz waves crossing a deliberately engineered barrier while carrying data at 100 Gbit/s, with the work published in the journal Advanced Materials.
Read the full explanation →