Astronomers have shown how gravitational lensing allows us to see the faintest and most distant galaxies, helping us to understand the origin of the Universe. The first gravitational lens, a ...

Scientists have observed a supernova explosion from 4 billion light years away in an extreme case of gravitational lensing—where distant objects are magnified by galaxies bending the light emitted ...

It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, falling apart on cosmic scales. If you’re on the surface of Earth—and I’m ...

TEHRAN (Tasnim) – We tend to think that light travels in a straight line, but this is not always the case in our universe, when strong enough, gravity can pull photons of light out of their trajectory ...

When light moves from air into glass or plastic it is refracted close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ...

Optical microscopy is a very useful technique to examine the appearance of a sample with greater detail, but there are some limitations that provide a boundary to its use in practice. Cross section of ...