GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When studying celestial bodies, scientists examine satellite images of the same object made with different waves of the electromagnetic spectrum. How does using different types of electromagnetic waves provide a more complete understanding of the celestial bodies?
A
EM waves have the same energy which provides unique information.
B
EM waves travel at different speeds which provide unique information.
C
EM waves travel the same distance which provides unique information.
D
EM waves have different wavelengths which provide unique information
Explanation: 

Detailed explanation-1: -How does using different types of electromagnetic waves provide a more complete understanding of the celestial bodies? EM waves have the same energy which provides unique information. EM waves travel at different speeds which provide unique information.

Detailed explanation-2: -Visible light and radio waves get through to telescopes on the ground, and some detectors (infrared, UV and gamma) work when they are high up on mountains. The best place to detect most radiation is above the blocking atmosphere, so some telescopes are put in orbit around the Earth.

Detailed explanation-3: -Radio telescopes look toward the heavens to view planets, comets, giant clouds of gas and dust, stars, and galaxies. By studying the radio waves originating from these sources, astronomers can learn about their composition, structure, and motion.

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