1.Suppose we wish to obtain the real image of a distant tree.
Explain two possible ways in which we can do it.
2. It was observed that when the distance between an object and
a lens decreases, the size of the image increases. What is the
nature of this lens? If you keep on decreasing the distance
between the object and the lens, will you still able to obtain
the image on the screen? Explain.
3.You are given three mirrors of different types. How will you
identify each one of them?
Explain two possible ways in which we can do it.
2. It was observed that when the distance between an object and
a lens decreases, the size of the image increases. What is the
nature of this lens? If you keep on decreasing the distance
between the object and the lens, will you still able to obtain
the image on the screen? Explain.
3.You are given three mirrors of different types. How will you
identify each one of them?
Answers & Comments
Answer:
1. Use a concave mirror or a convex lens. Only these 2 can produce a real image.
2. It is a convex lens. Only a convex lens will produce a enlarged image if you move the object closer. You cannot obtain the image on screen since a real image cannot be formed once the object distance becomes lesser than the focal length.
3. Concave mirror: Can obtain the image on screen.
Convex mirror: Image looks diminished
Plane mirror: Image is laterally inverted