| 释义 |
Herschelian, a. (n.)|həˈʃɛlɪən|
[f. proper name Herschel + -ian.]
Of or pertaining to the astronomer Sir William Herschel (1738–1822), or his son Sir John Herschel (1792–1871). Herschelian (telescope), a form of reflecting telescope having a concave mirror slightly inclined to the axis. Herschelian rays, the ultra-red heat rays of the spectrum, the existence of which was first proved by Sir W. Herschel.
1792Phil. Trans. LXXXII. 310, I looked at the planet with an Herschellean four and seven-feet reflector. 1837Goring & Pritchard Microgr. 155 The Newtonian and Herschelian telescopes having very small angles of aperture, will admit of concave metals with spherical figures. 1838Proc. Amer. Phil. Soc. I. 58 A seven feet Herschelian.
So Herˈschelic a. = prec.
1874Fiske Cosmic Philos. i. I. 19 Beyond the red..lie the so-called Herschellic rays, of least refrangibility. |