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Atomic Structure

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  1. Which of the following waves can propagate in a vacuum ?
    1. Radio waves
    2. Light waves
    3. X - rays
    4. Ultrasonic waves
    Select the correct answer using codes given below
    Codes:
    1. 1, 2 and 3
    2. 1, 2, 3 and 4
    3. 2, 3 and 4
    4. 1 and 4
Correct Option: A

NA


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