Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 65
obliquity, when the luminary is In what direction is an object seen. In passing out of a rarer into a denser medium,how is the ray bent! What is said respecting the atmosphere? What is Astronomicalrefraction. Explain from figure. Why is the course of the ray a curved and not a brokenline? When is a… … REFRACTION. the rays of a star in the zenith fall perpendicularlyupon the atmosphere. The refraction is therefore great-est at the horizon, and constantly decreases with the altitude, until at the zenith it becomes nothing. The follow-ing table exhibits the amount of refraction at…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
