Seti searches are conducted in what range of wavelengths of light?

Seti searches (or "search for extra terrestrial intelligence") is a collective term for different scientific searches for intelligent extraterrestrial live. Some examples of these searches are the monitoring of some electromagnetic waves in order to find a type of comunication.

The range of wavelengts is the range in wich the comunications may took place.

One good range is, in the microwaves, the range from 1 GHz to 10 GHz.

Other interesting range is the range of the "water hole", that goes from 1420 MHz to 1720 MHz, this range is interesting because the molecules of water emit at 1420MHz, and the hidroxyl molecules emane ini a range from 1600MHz to 1720MHz

Here the ranges are given en frequencies, but we can obtain the wavelengths by the equation:

velocity = wavelenght/freq.

where the velocity is c = 3*10^8m/s

for the more general range we have:

λ1 =  3*10^8m/s*(1*10^9 Hz) = 3*10^17 m

λ2 = 3*10^8m/s*(10*10^9 Hz) = 3*10^18 m

and the range for the "water hole" is:

λ1 =  3*10^8m/s*(1420*10^6 Hz) = 4.260*10^17 m

λ2 = 3*10^8m/s*(1720*10^9 Hz) = 5.160*10^17 m

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

answer(20) psi;