Question

What is the first step normally taken when you look through the ocular lenses?

What does it mean that the image is inverted when you look through the ocular lenses?

What is the difference between the coarse adjustment knob and the fine adjustment knob? When is it appropriate to use them?

What new details are you able to see on the slide when the magnification is increased to 10x that you could not see at 4x? What about 40x?

Answer 1

First, we move focus knob to adjust focus when we see through ocular lenses.

The ocular lenses make a virtual and inverted image of the real image made by objective lens. Therefore, we see inverted image of the real image. Actually, the real image is already inverted to the object, but we see straight image through the help of ocular lens.

Coarse adjustment uses when we are not capable to see the object. This adjustment moves the stage up and down and helps the object or slide to get in focus. Now, the fine adjustment is useful for making the image sharp. Fine adjustment is present inside the coarse adjustment.

Here when we move from 4x to 10x or 40x, we get more insider view of the slide. The 4x view provides us the outer area of the slide. 10x image reaches closer to the inner side of the slide. However, the 40x shows us the inside view of the slide, which provides us deep details.

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