Question

1. which of the following is not used by scientists on earth to observe x - rays and gamma rays?

telescopes on mount everest
satellites
scientific balloons
rocket flights

Explanation:

X - rays and gamma rays are high - energy electromagnetic radiation. The Earth's atmosphere absorbs most of these rays. Telescopes on Mount Everest are still within the Earth's atmosphere and would not be effective for observing x - rays and gamma rays. Satellites are in space (outside the Earth's atmosphere), scientific balloons can reach high altitudes (reducing atmospheric interference), and rocket flights can also get above a significant portion of the atmosphere for short - term observations.

Answer:

telescopes on Mount Everest