The back of the eye is lined with a layer of specialized light-sensitive neurons in the retina, arranged in a mosaic, called photoreceptors. Each photoreceptor has a tapered elongated shape—like a bottle—oriented perpendicular to the retina and pointing toward the pupil of the eye. The... click to read more

Light consists of chargeless particles called photons. While electrons, being charged, get deflected into curved paths when placed in a magnetic field, the chargeless photons do not feel a real magnetic field the same way. Devising an “artificial” or “fictitious” magnetic field for photons would... click to read more

To a classical physicist, there is no fundamental limit to how well you can measure something. A classical object, for example, always exists in a well-defined position; if you want to know that position with better accuracy, you simply build a better microscope. The story... click to read more