As the perceived wavelength or energy of the photon depends on the relative motion between the source of the EM wave and the receiver (matter), this isn’t a trivial question at all.

It isn’t complicated, just too many ifs to give a brief answer here.

The procedure elaborated on here should do the trick: https://www.thewindowsclub.com/set-default-folder-view-windows

Well – is it technically a flight if the airplane is still on ground?

As Debian testing doesn’t get (all) security fixes, it is NOT ment for running a secure server. This is what stable is for. https://wiki.debian.org/DebianTesting

In German and Swedish, “the twelft eleventh” would be totally fine. Beside this would be November 12th. The German way for the year would be twothousandtwentyfour while the Swedish would be twentyhundred twentyfour.

See also https://aussie.zone/post/15854596

The query actually shows a lack of confidence. He should have googled “How to recover a file from /dev/null?” instead.