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She could already see its field, like a concavelens.
2
It was a concavelens, like some powerful optical instrument.
3
By means of a concavelens (L) the image may be made to fall on the retina (dotted lines).
4
It distorted, as if that circle outlined the position of a concavelens, then it was gone, completely enclosed in a large silvery bubble.
5
A concavelens has been substituted for the collimator and slit, and besides other advantages, a great saving in length is secured by this change.
Usage of convex lens in English
1
If parallel rays of light fall upon a double- convexlens, D D, Fig.
2
The convexlens is placed in the more outward position in the telescope, i.e.
3
In addition, we directly showed that the cell body acts as a convexlens.
4
The convexlens found at Nimroud shows that they were not unacquainted with magnifying instruments.
5
Fig 5 represents a double- convexlens, Fig.
6
A man's mind was meant to receive as a mirror, not to concentrate rays like a convexlens!
7
By means of a convexlens it may be focused on the retina without accommodation (dotted lines).
8
A double convexlens three feet in diameter is worth $60,000.
9
It had been sifted by passing it through a solution of alum, and through the thick double- convexlens of the lamp.
10
The man wore a mask of perfectly smooth, rounded mirror, a convexlens that sent Benjamin's distorted face back at him.
11
C is a frame for holding the negative, on the opposite side of which is a double convexlens facing the light.
12
This was the suggestion to use two plano- convex lenses, placed at a prescribed distance apart, in lieu of the single double- convexlens generally used.
13
To him, and apparently to him only, among all the inquiring spirits of the time, were known the properties of the concave and convexlens.
14
The convexlens of the eye-piece was carried not by a tube properly so called, but by four rigid fine wires placed at right angles.
15
Then, as she gradually moved from behind the Earth, her appearance was magnified by the convexlens formed by the atmosphere, bent over that planet.
16
Possibly I inherit my aunt's tendency to magnify into extraordinary proportions trifles which I look at through the double convexlens of a personal interest.