Telescopes
Telescopes are optical instruments designed for observing distant objects, primarily in astronomy. They gather and focus light to produce a magnified image of celestial bodies. Telescopes can be categorized into refracting telescopes, which use lenses, and reflecting telescopes, which use mirrors.
As we use a telescope to view an item from a great distance away, it must have at least two lenses. The first lens creates a smaller image that is closer to the focus point. This gadget is constructed in such a manner that the true and inverted picture created by the first lens is only slightly closer to the focal length of the second lens.
Parts of Telescope
- Objective Lens
- Eyepiece
- Focuser
- Tube
- Mount
- Finder scope
Types of Telescope
There are the two main types of the telescopes
- Reflecting telescope: A reflecting telescope does not utilize a lens to concentrate light. Instead, it uses concave mirrors.
- Refracting telescope: A refracting telescope is an astronomical telescope in normal adjustment that can focus light through two lenses and magnify the target to make it appear closer than it is. Convex lenses are employed in refracting telescopes because they bend light inwards.
Working of Telescope
Telescopes are optical instruments designed to gather and magnify distant light, allowing us to observe celestial objects such as stars, planets, galaxies, and nebulae. The primary function of a telescope is to collect as much light as possible from distant objects in space. Once the light rays are collected, they are focused to form an image. The focused image is viewed through an eyepiece, which further magnifies the image formed by the objective lens or primary mirror. The user can adjust the focus of the telescope using a focuser mechanism.
Optical Instruments
Optical instruments are devices designed to manipulate and detect light for various purposes, ranging from imaging to measurement and analysis. They utilize the principles of optics, which is the branch of physics that deals with the behavior and properties of light.
In this article, we will study about optical instruments, different types of optical instruments such as eye, lens, microscope, telescope, periscope, and kaleidoscope, and their working.
Table of Content
- What are Optical Instruments?
- Different Types of Optical Instruments
- Eye
- Lens
- Microscope
- Magnifying glass
- Telescopes