1. Explain how you would be able to tell the difference between a converging and
ID: 1456096 • Letter: 1
Question
1. Explain how you would be able to tell the difference between a converging and a diverging lens.
2. What does the term focal length mean?
3. What is the difference between a real and virtual image?
4. A simple magnifying glass is a common example of how we use converging lenses in an everyday application. Is the image real or virtual with a simple magnifier?
5. If an object is initially placed at a distance where the image is equal to it in size, what is the object distance d0 in terms of the focal legth f?
Explanation / Answer
1. A converging lens is thick in the middle and where as thin in the middle for diverging lens.
A conderging lens (convex) forms real image on the screen by a distant object.
A deverging lens (concave) does not form real image of a distant object. (this is easy method to distingish )
2. the distance between the pole and the principal focal point is called focal length. Denoted as f
3.A real image can be formed on the screen where light rays really meet.
Whereas virtul image is the image which cannot be hold on the screen when divergent rays are extended virtually back where they appear to start is the virtual image.
4. Asimple magnifying glass is a convergent lens. when object is placed between pole and principla focus
the magnified and virtual image is formed. it is erect image.
5. d =2f if object is placed at 2f image also formed at 2f of convex lens.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.