What Conditions Restrict the Suitable Wavelength Range for Communication with Extraterrestrial

question 38

Multiple Choice

What conditions restrict the suitable wavelength range for communication with extraterrestrial intelligence to the "water hole" in the high-frequency radio range of the electromagnetic spectrum?

• A) cosmic background radio noise at low frequencies and radio noise from the Sun and Jupiter at high frequencies
• B) local radio noise from television, radio, and aircraft across the band, except a narrow range in which transmission is prohibited by international agreement to permit such extraterrestrial communication
• C) atmospheric absorption by the ionosphere at low frequencies and by CO₂ at high frequencies in the long infrared range
• D) high galactic radio background noise at low frequencies and high atmospheric absorption by H₂O and O₂ at high frequencies, with a suitable region in between

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Definitions:

Passive Resistance

A method of non-violent protest against authority by refusing to cooperate or participate.

Active Resistance

The deliberate and overt refusal to comply with or accept a certain situation, often manifesting through actions rather than passive objection.

Unfreezing

The initial step in the change process where existing patterns are questioned, leading to the motivation for change.

Constructive Criticism

Feedback given with the intent of helping someone improve, focusing on specific issues and offering solutions for growth.