Question

Give scientific reason: A simple microscope is used by watch repairers.

Answer 1

Hint: A simple microscope is an optical device which can be used to view very small things. The magnifying property of this instrument can be used to view things which contain very small parts in their structure.  

Complete answer:

A simple microscope is an optical instrument made of double convex lenses. The working of a microscope is such that the light from a source is first reflected by a mirror towards the first lens which forms the magnified image of the object being viewed. But this magnified image is a further made incident on another lens which magnifies the image even more. Finally the light from the magnified image is reflected towards the eyepiece which is the point where the observer views the magnified image of the object.

A watch is a device which contains many small parts working together to provide the correct display of time. If something goes wrong in it or the watch stops working then in order to properly view those small working parts the watch repairer uses a simple microscope which is able to magnify those small parts to the extent that they can be viewed easily and repair can be done easily. Without a magnifying device, it is very difficult to work on the small parts of the watch. A simple microscope can be found at every watch repairers shop.

Note: The simple microscope is used for many other purposes. It is an integral part of a biology and medical lab. Blood cells and tissues can be viewed under the simple microscope but otherwise the magnification of this device is limited. Many new kinds of microscope have been developed which use new technologies to give much more magnification than a simple microscope.