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Predict/Calculate For each of the following cases, use a ray diagram to show that the angular sizes of the image and the object are identical if both angles are measured from the center of the lens. (a)Aconvex lens with the object outside the focal length. (b) A convex lens with the object inside the focal length.(c) A concave lens withthe object outside the focal length. (d) Given that the angular sizedoes not change, how does a simple magnifier work? Explain.

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Physics 103

Chapter 27

Optical lnstruments

Wave Optics

Cornell University

University of Washington

University of Winnipeg

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Hello friends in the first case it is given are convex lens and the object is placed outside. The focus went so this is the contact lens. Yeah, Optical center. This is a focus point EP objective place here. So one day we can take incident on the lens. We'll learn toe the principal axes. Then it converts to the focus point. Another way we can take passing through the optical center thes to raise our converting at this point. So at this position, we will get really inverted and and large meets. So here is the object on eight as readers is the image which is really inverted in on large. No second case, be part There is a convex lens here again. Convex lenses given, but object is placed between optical center and focus point. Right, you know So here this is the object bakery off like political principal axis. It has to be converse through the focus point and the great passing to the optical center. So these reef refracting gray are diverging, So we will get virtual and large and it activates when these rates are to be extended in the backward direction. Just a moment please. So this is the image? Yeah. Virtual direct and a large. Yeah. In the first case, it says image really inverted and a large no Turkish. There is a concave alliance on object is place outside of focus went turkey's I'm discussing here it is given concave Linz. It is diverging lens objective place here. One day you can take passing through political principal axis. Then it gets drivers passing through the so Chris pine and the way you can take passing through the optical center. So refracted re appears to be diverging from from this point. So here you will get image. So this is the image in this case virtual erect and diminished. That is size of diamonds. It's less than the side of the object. See now let me discuss the magnified so far, magnifier For simple magnifier we have to use Oh, convict Linse. The object which is to be magnified, must be kept in between four. Our optical center you may call and focus went so that virtual on large direct image it's for by adjusting the the position off object between optical center and focus point off the length in May must be fun at distinctive vision off of our right. That's thanks for watching

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