Quick select the Read More link and
catch the virtual blog post and win a prize!
You've caught the virtual blog post. Congratulations, you've won a physics lesson by a questionable authority (me)!
Like a virtual particle, sometimes the virtual post exists; sometimes, it doesn't.
I've always thought that virtual particles explained why electrons appear to zig-zag through the screen slits in the classic experiment. I'm probably wrong, because I'm a self-taught physicist with a specialty in anti-matter propulsion drives.
Given my questionable credentials, I've outsourced my lesson.