Question

A scientist is designing a device that will mimic Earth's atmosphere by blocking high-energy waves from the Sun. Pick three high-energy waves that the device should be able to block.
Responses

Radio
Radio

X-ray
X-ray

Infrared
Infrared

Ultraviolet
Ultraviolet

Gamma Ray
Gamma Ray

Microwaves

Answer 1

Ultraviolet, X‑ray, and Gamma Ray.

Why:
- Ultraviolet (≈10–400 nm): UV‑B and UV‑C are biologically damaging (DNA/skin) and are largely removed by Earth’s ozone layer, so a mimic should block UV.
- X‑rays (≈0.01–10 nm) and Gamma rays (<0.01 nm): both are highly ionizing and are absorbed by the atmosphere (via photoelectric effect, Compton scattering and pair production) and must be blocked to prevent severe radiation damage.

Practical notes (brief):
- UV can be blocked with an ozone‑like layer or UV‑absorbing coatings/materials (special glass, polymers or molecules that absorb in 200–320 nm).
- X‑rays and gamma rays require dense, high‑Z shielding (lead, tungsten, concrete) or sufficient column mass; thickness scales with photon energy.
- Radio, microwaves and most infrared are lower energy and largely pass through or are managed differently (transparent windows, greenhouse balance), so they aren’t primary targets for high‑energy blocking.