# astronomical refraction in a sentence

1) For astronomical refraction, this is the whole atmosphere; so some simplification is helpful.

2) Unfortunately, this isn't enough to determine the actual amount of astronomical refraction at the horizon.

astronomical collocations
3) At these heights, the rays orbit the Earth, and the astronomical refraction becomes nearly infinite.

4) Cf. astronomical refraction .

## astronomical refraction example sentences

5) But if the terrestrial refraction is just part of the astronomical refraction, shouldn't the two behave similarly?

6) In other words, the prism analogy works for terrestrial refraction, even though it doesn't work for astronomical refraction .

7) Under him, Hausdorff graduated in 1891 with a work on the theory of astronomical refraction of light in the atmosphere.

8) And that's what's needed to calculate astronomical refraction near the horizon, and hence to connect terrestrial and astronomical refraction.

9) And that's what's needed to calculate astronomical refraction near the horizon, and hence to connect terrestrial and astronomical refraction .

10) Because the refraction is uniquely determined by the temperature profile, it's tempting to think we could use observations of astronomical refraction to determine the temperature profile.

11) So there's a region in the lower atmosphere that affects astronomical refraction at low altitudes, but has no effect whatsoever on the terrestrial refraction.

12) The problem is that astronomical refraction below about 15° altitude depends on the lapse rate in the lower troposphere – and more so, the closer to the horizon you look.

13) For example, Hervé Faye suggested in 1854 that astronomical refraction could be improved near the horizon by making use of the terrestrial refraction coefficient.

14) Remember Laplace's theorem : near the horizon, the astronomical refraction is proportional to the air mass in the line of sight.

### example sentences with astronomical

15) So one feature that makes terrestrial refraction behave differently from astronomical refraction is just the amount of bending atmosphere in the line of sight.

16) That makes the prism behave like the terrestrial refraction, not the astronomical refraction ; that's why I don't use this comparison in discussing astronomical refraction.

17) That makes the prism behave like the terrestrial refraction, not the astronomical refraction; that's why I don't use this comparison in discussing astronomical refraction .

18) In astronomical refraction, the magnification at the horizon, which explains the flattening of the setting Sun, depends mainly on the lapse rate below the observer.

19) On the other hand, the ray bending involved in terrestrial refraction is just a part of the whole astronomical refraction – the part produced by the lowest layers of the atmosphere.

20) Oriani's theorem deals with a coefficient in the Lambert's series expansion of astronomical refraction in powers of tan Z, where Z is the apparent zenith distance at the observer.

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