Photon–Photon Interactions and the Opacity of the Universe in Gamma Rays
We discuss the topic of the transparency of the Universe in gamma rays due to extragalactic background light, and its cosmological and physical implications. Rather than a review, this is a personal account on the development of 30 years of this branch of physical science. Extensive analysis of the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/7/5/146 |