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

Physics Viva Questions Class 12 (2026): CBSE Class 12 practical examinations for the 2026 board exams are being scheduled in ...
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What are the different types of lenses?

When light moves from air into glass or plastic it is refracted close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ...