Ray Optics and Optical Instruments

Ray Optics and Optical Instruments

Ray Optics is a very commonly heard term,as it is related to light which is a very important part of our daily life.Optics is the branch of physics which studies the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it.Ray optics is also called geometrical optics as it uses the geometry of straight-line paths (rays) to explain the optical phenomena. Optics usually describes the behavior of visible, ultraviolet, and infrared light.Ray optics, infact, is the limiting case of wave optics. This means for most practical purposes, we can ignore the deviation from straight-line path as postulated by wave theory.

Optical Instruments: Let us learn about some of the optical Instruments
The first thing that comes to our mind when we say "Optical instruments" is a pair of spectacles.......but it is not true they are other types of optical instruments too,let us learn about the formation of various types of images by a lens for different positions of the object.

Microscopes:

A microscope is an optical device which produces a highly magnified image of very small object such as micro-organisms. Based on the design, there are two types of microscopes. They are, simple microscope and compound microscopes.
Simple Microscope

A simple microscope is nothing but a single biconvex lens. It is referred to as magnifying glass.
Compound Microscope

A compound microscope is an optical instrument which is used to magnify very small objects like blood cells, bacteria which otherwise cannot be seen with the naked eye.
Telescopes

Telescope is an optical instrument which is used for viewing heavenly bodies and distant objects.
Astronomical Telescope

This type of telescope is used to view heavenly bodies like stars, planets and satellites.

We might also come across questions such as:Which instrument is used to measure temperature??

The answer would be a "Thermometer". These are some basic examples of Optical Instruments.


Hope you like the above example of Ray Optics and Optical Instruments
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