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State the part of the electromagnetic spectrum to which 21 cm (wavelength emitted by atomic hydrogen in interstellar space).belongsa)Ultravioletb)Microwavec)Visibled)Radio (short wavelength end)Correct answer is option 'D'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about State the part of the electromagnetic spectrum to which 21 cm (wavelength emitted by atomic hydrogen in interstellar space).belongsa)Ultravioletb)Microwavec)Visibled)Radio (short wavelength end)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for State the part of the electromagnetic spectrum to which 21 cm (wavelength emitted by atomic hydrogen in interstellar space).belongsa)Ultravioletb)Microwavec)Visibled)Radio (short wavelength end)Correct answer is option 'D'. Can you explain this answer?.

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