One of the "quiet" bands in the electromagnetic spectrum used for SETI is the so-called "water hole" between about 103 and 104 MHz. What is the principal source of the natural signals in this frequency band?
A) emissions from the water molecule
B) emissions from oxygen molecules
C) cosmic microwave background radiation
D) radio emission from terrestrial sources
Correct Answer:
Verified
Q45: Around which types of stars are astronomers
Q46: What conditions restrict the suitable wavelength range
Q47: For which of these factors in the
Q48: The first successful detection of signals from
Q49: What is the status of the search
Q51: If astronomers are going to "listen" for
Q52: The numerical value given by the Drake
Q53: Probably the MOST difficult factor to estimate
Q54: The Drake equation attempts to predict the
A)
Q55: It is unlikely that planets near stars
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents