Question

because our atmosphere absorbs most of the other wavelengths of the electromagnetic spectrum, telescopes on the surface of the earth can only operate in which two specific regions of the electromagnetic spectrum?

radio waves and gamma rays

visible and radio waves

visible and x - ray

ultraviolet and x - ray

Explanation:

To determine the correct answer, we analyze the electromagnetic spectrum regions that Earth's atmosphere allows to pass for ground - based telescopes. The atmosphere absorbs most wavelengths. Gamma rays, X - rays, and most ultraviolet rays are absorbed. Radio waves and visible light can pass through the atmosphere to a large extent, enabling ground - based telescopes to operate in these regions.

• Option 1: Gamma rays are absorbed by the atmosphere, so this option is incorrect.
• Option 2: Visible light and radio waves are both regions of the electromagnetic spectrum that can pass through the Earth's atmosphere, making this option correct.
• Option 3: X - rays are absorbed by the atmosphere, so this option is incorrect.
• Option 4: Ultraviolet and X - rays are mostly absorbed by the atmosphere, so this option is incorrect.

Answer:

B. Visible and Radio waves