principle focus

A simple microscope is nothing but a single biconvex lens. It is referred to as magnifying glass. Magnifying Glass Usually the focal length of the convex lens is around 2.5 cm. The object to be viewed through a simple microscope is placed between the optic center and the focus and the ima..

The ray diagram given below gives the principle of a compound microscope. The object is mounted on the stand below the microscope tube. The objective lens forms a real, inverted and magnified image (I 1 ) of the object. The image I 1 acts as an object for the eye piece. The position of th..

Lasers-An Introduction - The laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The laser has been invented and developed in 1959 and 1960. In the laser, the maser principle has been extended to optical or visible light frequencies of 10 1 4 to 10 1 5 cycle/s..

>It consists of a converging lens of small focal length. Object is held between principal focus and optical centre of the lens. The image formed is virtual, erect and magnified. Magnifying power of a simple microscope is defined as the ratio of the angles subtended by the image and the ob..