Fortune-telling drawing paper _ fortune-telling drawing card.

What will happen if Newton's ring pulls out the pad paper or puts a new paper in it to interfere with the fringes?

The premise is that there is nothing in it compared with the initial state of Newton's ring device. Then:

1: When inserting paper, the concentric Newton's rings will move like the inside.

Of course, the second situation is easy to understand. Taking out the paper is equivalent to not padding it, that is, you first go east 100 meters, and then ask you to return to the original point. Then you can only go west 100 meters. Similarly, the interference fringes will of course move outward.

3. Reason: only explain the paper pad, and remove the paper, which is equivalent to the prototype and has no meaning.

In fact, it is very troublesome to explain, because it involves one and a half wavelengths. Assuming that this problem is ignored (it is really meaningless to explain this phenomenon), then you know that bright stripes are odd multiples of half wavelength and dark stripes are even multiples of half wavelength. In this case, for a certain position on the Newton's ring device (that is, a certain point at a constant distance from the center of the Newton's ring device), assuming that the point forms a bright stripe, that is, the thickness of the air film at that point is an odd multiple of half wavelength, assuming that it is 7 times, then when you put a piece of paper in (assuming that the thickness of the paper is 1 half wavelength), it must be another point (at this point, Then, of course, it gives you the feeling that Newton's ring has moved to the center as a whole.

I hope I can help you.