Geometrical Optics

Working principle and description of Reflecting Telescope Reflecting Telescope is a telescope in which a mirror is used to collect and focus light. In 1663…

Reflecting Telescope is a telescope in which a mirror is used to collect and focus light. In 1663 scientist Gregory first invented this telescope. In…

Principle of Astronomical Telescope The telescope which is used for viewing celestial bodies like sun, moon, Planets, stars etc. is called astronomical telescope. It is…

Astronomical Telescope The telescope which is used for viewing celestial bodies like sun, moon, Planets, stars etc. is called astronomical telescope [Figure]. It is an…

Advantages and Disadvantages of an Astronomical Telescope The telescope which is used for viewing celestial bodies like sun, moon, planets, stars, etc. is called an…

Telescope Celestial bodies at long distances cannot be seen by bare (naked) eyes. These bodies are seen by telescope. So, the optical instrument which is…

Compound Microscope The magnifying power of a simple microscope depends on the focal length of its lens. The smaller the focal length the more will…

Simple Microscope or Magnifying glass This instrument is used for small magnification. It contains a convex lens of small focal length placed in a frame…

Power of a lens Definition: The power of a lens means its power of convergence in case of a convex lens or its power of…

Microscope There are many things in front of us that we cannot with our eyes. Besides, there are many things which we see by bare…