What is an atmospheric window? A. A region in the atmosphere where light can get through
B. A region in the atmosphere where infrared radiation can penetrate
C. A range of wavelengths of electromagnetic radiation which transmit through the Earth's atmosphere
D. A part of the upper atmosphere with depleted ozone
E. Only A and D above

A

Explanation:

Because it is a region in atmosphere that allows an particular wavelength of EMWs to pass through and of the options above only visible light is allowed to pass through

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

3. dark matter

empty space could also be a simple vacuum