Kalics

  “How to recognize whether the photograph is 2 D or 3 D”      Nowadays everyone is fascinated with ‘selfie’ . Everybody’s mobile memory is full of photos. Usually most of the information is collected from ‘Google’ . After the invention of Laser, in 1960, the technique of storage of information got vastly modified. Today we get stored information in variety of forms. Mostly we come across 2 D and 3 D photographs. Now question arises like “Whether the photograph is 2 D or 3 D?”  Let’s discuss --- “How to recognize whether the photograph is 2d or 3d” Working of eye:      Fig A        Fig B             Light reflects off objects and travels in a straight line to your eye.(Fig A) Light passes through the cornea into the pupil and then through the lens. The cornea and lens refract the light to focus on the retina. (Fig B) Photoreceptors on the retina convert the light into electrical ...

Basic facts about LASER Laser is acronym for L ight A mplification by S timulated E mission of R adiation. Introduction and History:      Laser is like magic light machine that can cut, drill, weld metals, perform bloodless and painless surgeries, destroy satellites, help in computer use and provide sophistication to almost all phases of life. The discovery of laser changed drastically the scientific and technology world during second half century of 20 th century.     As it is seen that the conventional light obtained from sun, starts, electric lamp, fire, etc. is un-polarized, incoherent, divergent and weak. Hence, researcher focused on getting polarized, coherent, directional and bright light.       In 1917, Albert Einstein predicted theoretically the process of stimulated emission. This process is basic principle of laser. But due to practical problems involved in development practical laser took 43 years. The first working ...