Mirror is of two types; concave and convex mirror where as lens is a transparent or a piece of glass having a curved ... the centre of curvature and focus. (c) Real, inverted and diminished ...

“Now we have glass on the telescope, which brings us a thrilling step closer to revolutionary science with Rubin.” Related: ‘It’s going to be awesome’: How the Vera C. Rubin Observatory ...

Casting of the secondary mirror for the European Southern Observatory’s Extremely Large Telescope has been completed in Mainz, Germany. Weighing 3.5 tons and measuring 14 feet in diameter, the ...

We’ve always believed that it is better to get used to the distorted view of the convex mirror than change to a flat one. I can understand why people become frustrated by the distorted view, but the ...