An Optical Illusion [99] The engraving shows a perfectly straight boxwood rule laid over a number of turned brass rings of various sizes.
Optical Illusion [206] Can you tell which of these three figures is the tallest?
To summarize, the apparent abrupt ending of a searchlight beam is purely an optical illusion.
A very unusual kind of optical illusion is illustrated by the phenomenon of the apparent ending of a searchlight beam which has attracted much attention in connection with the powerful searchlights used for locating aeroplanes (Fig.
This might almost be described as an optical illusion, and it makes another interesting proof that the eye can be deluded by cinematography.
For a fuller account of the various mechanical arrangements for producing optical illusion, I must refer the reader to the writings of Sir D.
The whole thing is, as I have called it, an optical illusion, due to the hypnotism of an obsolete terminology.
Then he perceived the yellow patch was only a reflection from the water-bottle, and his thoughts turned to the problem of painting sunlight by optical illusion.
Immeasurably puzzled, and wondering if the smoke had been an optical illusion, he returned to the living-room.
True, that my midnight visitor might have been an optical illusion, produced by the mysterious surroundings acting upon my highly-susceptible temperament.
I was almost sorry that my ghostly mysteries had found so commonplace a solution--a mechanical defect taking the place of the phantom key, and an optical illusion explaining my midnight vision!
This was too real, too solid, too substantial for an optical illusion!
Not being a transcendentalist or a visionary, I am forced to the conclusion that what you thought you saw, was, really nothing but an optical illusion!
Or had she been the victim of an optical illusion?
An Optical Illusion A very deceiving illusion can be contrived with a bit of wire, a rubber band and a toothpick.
The beautiful luminous ring was simply an optical illusion, produced by the refraction of the terrestrial atmosphere.
Hampered by no atmosphere, he was free from all liability to optical illusion.
But again he thought of the shadow he had seen; now, however, only to dismiss the subject as an optical illusion.
There was no dream now; not even an optical illusion.
In some exhibition in London there is shown a curious instance of optical illusion; at the end of a corridor you see, apparently in strong light, a human skull.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "optical illusion" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
