CBSE class 12 physics viva questions 2026: Important practical questions with answers, download PDF

CBSE Class 12 practical examinations for the 2026 board exams are being scheduled in many schools during the second half of ...

Radio telescopes uncover 'invisible' gas around record-shattering cosmic explosion

Astronomers using the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) instruments, the U.S.