The effect on this restoration caused by the deviation of the electromagnetic coefficients from the "perfect lens" conditions was discussed.

同时讨论了异向媒质电磁参数与理想完美透镜条件的偏差对异向介质对倏逝波恢复作用的影响。

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Perhaps its greatest moment came in 1979 when it was the first telescope to observe a gravitational lens, an effect where a "massive" object bends electromagnetic radiation such as light around it.

BBC: Aye to the telescope