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Given below are some famous numbers asso...

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
21 cm (wavelength emitted by atomic hydrogen in interstellar space).

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This wavelength correspongs to radiowaves.
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  2. Suppose that the electric field part of an electromagnetic wave in vac...

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  3. Suppose that the electric field part of an electromagnetic wave in vac...

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  10. Given below are some famous numbers associated with electromagnetic ra...

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  11. Given below are some famous numbers associated with electromagnetic ra...

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