In: Nursing
The diagram is of a microscope.
It is not a toy.
It is used to see the very small objects, cells or microbes by enlarging their size.
Before it's it' it is set in a standard way in adequate amount of light so that subject can be seen brightly.
You can not throw it or hit it or any careless activities should not be performed with the instrument otherwise it will become useless and functionless.
The right way to use it is first put it in a bright light and at a plane surface. Then put the slide on fixed stage and use the movable mirror to adjust the amount of light and the use the coarse adjustment screw to get the sharp image of cells or microbes etc. which is placed on slide. You can magnify the image by changing lens which is used for zooming the object.
You cannot throw it.
You cannot drop it.