Question

the surface of lens used by the watch mechanic is​

Answer 1

Answer:

this one has the same as well

Answer 2

The surface of the lens used by the watch mechanic is Thicker in the middle and thinner at the edge.

Explanation:

A watch mechanic repairs very minute parts of the watch which are quite difficult to deal with through naked eye. That is why a lens is used to magnify the image of the object. For this, we use a convex lens and keep the object between focus and optical center.

The diagram for this has been given in the attachment.

In the given diagram, we see that when the object is kept between optical center O and focus F, then the object's image is turned out to be magnified and erect, which is what we desired.

Now coming back to the question, we see that the convex lens are thicker in the middle and thinner at the edge.

Hence the surface of lens used by the watch mechanic is thicker in the middle and thinner at the edge.

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