With an apparent magnitude of 15.05, Kepler-28 is effectively invisible to the naked eye from Earth.

Scientists are working on a cloaking method that would render tanks effectively invisible.

The program runs in the background of the mobile phone interface and is effectively invisible to the end user.

That meant that an object placed inside the cylinder was effectively invisible.

So we're effectively invisible- their sensors would simply show solar activity while we were here.

"That makes us effectively invisible to the naked eye," Maddalena muttered.

Or the maximum may occur in the middle of the day, and thus be effectively invisible.

Effectively invisible; if 1 hadn't been touching you, I wouldn't have known.

If the chains pass on a book, it becomes effectively invisible to a huge population of readers.

Gaea had assumed the form of a gallon of air, making her effectively invisible.