The "No-zone"
They can. Very large vehicles can have very large blind spots.
It's optics and anatomy of eye.
YES
Yes, you need to figure out where it is and how large of area it is.
do you have any blind spots?
We have blind spots because part of the retina in our eye do not have light sensitive cells. Fortunately, we are not aware of our blind spots because the blind spots of our two eyes do not coincide.
They have large blind spots to the rear and on the sides.
Trucks have very large blind spots. If you cannot look in the mirror and see the driver's face, he cannot see you.
Yes, they do. The blind spots are not as large as those for cars and trucks but they definitely do exist. It is difficult to keep track of a person following directly behind you on another bike even with your mirrors adjusted.
It depends on the vehicle. Manufacturers try to minimise blind spots.
blind spots