At the age of 80, she's 'riding a/the wave of' renewed interest in her work. [=she's experiencing a time when many people are interested in her work again]
The traffic cop 'waved' cars 'through'. [=waved in a way that told drivers to continue driving through a particular area]
The new school has triggered a 'wave' of optimism [=has made many people feel optimistic] about the public school system.
(..) Optical telescopes Can't see the black hole directly. But the glowing, super-heated gas surrounding the black hole Sends out radio waves that can be used to make an image. Huge radio telescopes pick up these signals from space. The antenna will move in azimuth and elevation. (..)2010 TvShow: How the Universe Works Title: Black Holes Season: 1 Episode 2