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Other than at the visible spectrum, when are most forms of electromagnetic radiation best studied?

Answer 1

At any time.

If by interference you mean that only visible light specifically suffers when observed from Earth, then even visible light frequencies are unaffected by time.

In similar vein, cloudy weather makes it difficult to use infrared frequencies.

Any electromagnetic frequency observed from space is independent of the time, place, or weather on Earth.

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Answer 2

Emma Arguello

Most forms of electromagnetic radiation are best studied outside the visible spectrum in specialized fields such as radio astronomy, X-ray astronomy, and gamma-ray astronomy.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.