The chief of his other contributions to optics was the explanation of the rainbow - an explanation far from complete, since the unequal refrangibility of the rays of light was yet undiscovered - but a decided advance upon his predecessors, notably on the De radiis visas et lucis (1611) of Marc-Antonio de Dominis, archbishop of Spalato. [Please select]
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It was simply so lowered in refrangibility as to escape the visual range. [Please select]
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Light of one degree of refrangibility--that corresponding to this particular green--is emitted by the thallium-vapour. [Please select]
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It corresponds in refrangibility with the yellow band of the spectrum. [Please select]
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A series of measures on highly colored red stars has been begun, and is in progress for the purpose of testing the possibility of a systematic error due to the lesser refrangibility of their light. [Please select]
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These are called line-spectra, and every chemical element possesses in the incandescent gaseous state its own characteristic lines of certain colour and certain refrangibility, by means of which that element can be recognised. [Please select]
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