Example sentences of "[prep] the naked eye and " in BNC.

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1 The whiskers were too small to see with the naked eye and nobody could possibly make a testing machine on that scale .
2 I well remember the occasion when he discovered a brightish nova , just about visible with the naked eye and easily seen with binoculars .
3 Præsepe , nicknamed the Beehive , is one of the finest clusters of its type ; it is easily visible with the naked eye and is well seen with × 7 binoculars , while with × 12 and × 20 it is truly glorious .
4 There is however one splendid open cluster , M41 , which is easily visible with the naked eye and is resolvable with × 20 binoculars ; various individual stars can be seen with lower magnifications .
5 Pollux is a K-type star , whose orange colour is noticeable with the naked eye and unmistakable in binoculars ; Castor is white , and is an interesting multiple system , though binoculars show it as single .
6 L2 Puppis is a semi-regular variable with a range of from 3.4 to 6.2 , so that it is almost always visible with the naked eye and is well within binocular range even at minimum ; it is of type M , and clearly orange .
7 In the same region is another wide pair , Mu , separable with the naked eye and very easy with × 7 ; the magnitudes are 3.0 and 3.6 .
8 It has a period of 357 days , and at minimum is so faint that large telescopes are needed to show it , but at maximum it has been known to rise to 5.7 , and is then just visible with the naked eye and very easy in binoculars .
9 The fourth wall was constructed of rows of teak slats , incorporated into which were two seamless sliding doors , impossible to detect with the naked eye and only capable of being activated by miniature sonic transmitters .
10 They are beyond the visible spectrum but we do not have to make our observations with the naked eye and there are ways in which y-rays can be detected to form an image pattern .
11 The mite is just visible to the naked eye and feeds on honey bees and their grubs by sucking their body fluids .
12 The equivalent of larval stages are completed within an egg capsule so that the young emerge at the crawling stage when they are easily visible to the naked eye and can be fed in captivity .
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