In this article, we review the implementation of isotropic metamaterials that exhibit a negative permittivity and a negative permeability, thus leading to a negative index of refraction. Specifically ...

Here’s how it works. Canon’s RF lens line-up has grown significantly since it launched in 2018. The catalog now includes something to cover pretty much any shooting scenario, from portrait ...

For the first time, scientists have demonstrated that negative refraction can be achieved using atomic arrays - without the need for artificially manufactured metamaterials. Scientists have long ...

Sirui is preparing to launch a brand new cine lens series with T1.4 apertures, replaceable mounts, and excellent optical ...

Do you use a Canon EOS R mirrorless camera? From wide-angle to telephoto, these are the best lenses we've tested for the platform. Images, and the devices that capture them, are my focus. I've ...

Find out how we test. You certainly can’t accuse Canon of having a meagre line-up of wide-angle zoom lenses for its EOS R system mirrorless cameras. With the advent of this RF 16-28mm, there are no ...

Rheumatoid factor (RF) levels above a normal range can indicate autoimmune conditions, such as rheumatoid arthritis (RA). Rheumatoid factor (RF) is an immune system protein that attacks healthy cells.

Astrodynamics and Spacecraft Toolkit Written in Zig! Features orbit prop, celestial precession, CCSDS parsing, RF parsing, fits image parsing, and more!

Learn about the reflection of high-frequency signals in 5G communications and how impedance discontinuities can influence ...

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