首页   按字顺浏览 期刊浏览 卷期浏览 Superstars and trapped light The geometrical optics of gravitationally intense bodies
Superstars and trapped light The geometrical optics of gravitationally intense bodies

 

作者: D. J. Baylis,  

 

期刊: International Journal of Mathematical Education in Science and Technology  (Taylor Available online 1975)
卷期: Volume 6, issue 2  

页码: 223-229

 

ISSN:0020-739X

 

年代: 1975

 

DOI:10.1080/0020739750060212

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Starting from the differential equation describing the path of a photon in the Schwarzschild field of a spherically symmetric non‐rotating star in empty space we derive the condition for the light emitted from such a star to return to its surface, and describe some features of its orbit. The principal results are(a)only stars of radius < 1‐5 (in units of the Schwarzschild radius) can recapture their photons,(b)no photon which is ultimately recaptured goes further than 1 ‐5 units from the centre of the star, (c) provided the stellar radius is <l‐5 the angular diameter of the star as seen by a distant observer isindependentof that radius.

 

点击下载:  PDF (322KB)



返 回