7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
The human eye: is the most valuable and sensitive sense organ and it is a natural optical instrument. The important parts of the eye: Cornea, Iris, Pupil, Eye Lens, Retina. Power of Accommodation: The ability of the eye to focus objects lying at different distances is called the power of accommodation of the eye. Least Distance of Distinct Vision Near point: Near point or least distance of distinct vision is the point nearest to the eye at which an object is visible distinctly The far point of the eye: Far point of the eye is the maximum distance up to which the normal eye can see things clearly. It is infinity for a normal eye. The twinkling of a star is due to atmospheric refraction of starlight. Scattering of light: When a beam of light falls on an atom, it causes the electron in the atom to vibrate. The vibrating electrons, in turn, re-emit light in all directions. This process is called scattering.