Tag "optical illusions"
We Do Not See Alike! (Jan, 1934)

We Do Not See Alike!

The sense of sight is inborn; but the use of eyes, like that of hands, is acquired, and the expertness gained by different people varies greatly. Here are some tests of sight.

WE are born with a sense of sight, but we must learn to use it; and there is quite a difference in the way different people interpret the things they see. The first example is the familiar one of the full moon. It seems to cover a fixed angle, which is the same for all observers—at the same time and place, at least. Yet one will tell you the moon looks an inch across; another that it looks a foot across.

YOU Can’t Always Believe What You See (Aug, 1930)

YOU Can’t Always Believe What You See

by Walter E. Burton

HAS this ever happened to you?

You go to a photographer, look handsome or pretty as the case may be, and have several portraits made. When you get the proofs you select the pose that looks the most flattering, and order a dozen prints. When you receive the finished pictures, nicely mounted, you are delighted . . . and then it dawns upon you that there is something wrong with the pictures, but you do not know exactly what it is.

How Your Senses Fool You (Jul, 1930)

How Your Senses Fool You

by Sam Brown

YOUR senses do fool you! Almost any doctor would tell almost any man that his five major senses were in perfect working order. Yet, take that same man and his five senses—seeing, hearing, smelling, tasting and feeling—and you will find that each of the senses, although usually pronounced perfectly sound, is subject to little quirks and twists that would seem to indicate that it is not the infallible indicator it is supposed to be.

Optical Illusion Improves Visibility of Highway Markers (Oct, 1939)

I’m guessing that someone’s last thought as they hurtled through the intersection right in front of a fast moving truck was “Why did someone paint ‘POTS’ on the ground?”

Optical Illusion Improves Visibility of Highway Markers

Optical illusions are now being turned to the cause of highway safety with the recent development by Frank McLaughlin, a Chicago, Ill., industrial designer, of road signs that are said to have a three-dimensional effect, although they are actually stenciled flat on the pavement. Designed according to a mathematical formula that applies to each letter of the alphabet, the sign’s property of seeming to stand up away from the street makes it visible to motorists 150 feet farther away than conventional road markers.

How Navy’s New Tricks Concealed Ships (Apr, 1946)

How Navy’s New Tricks Concealed Ships

Based on established and reliable optical laws, the Navy’s World War II camouflage used black and white ! painted patterns on vessels, producing startling visual deception that was confounding even at a 50-foot range. Strongly contrasted stripes in the designs made accurate observation virtually impossible. False, shadows created most deceiving illusions of shape. Sterns were “shortened,” gear was “hidden,” and entire ships were “heeled” through the scientific use of paint. The ineffective battleship gray and Dazzle System of camouflage (left) were rendered obsolete.


Certainly looks like a space ship to me.


Would you say that this queer-looking contraption was a jet-propelled life raft, a plane fuselage flying without wings, or some other super-secret, odd invention just released for public view? Perhaps, if you turn the picture upside down and think of reflections on water as you reexamine it, you will be able to tell. It’s the conning tower of a German submarine sunk alongside its dock at Hamburg. Note the radar antenna. Lt. Arthur L. Schoeni, of the Navy Department, sent the photo in.