Concave and convex lenses experimental questions: (Based on the lab experiment b

Question

Concave and convex lenses experimental questions:

(Based on the lab experiment below the questions):

A) Did objects appear larger or smaller looking through the concave lens? What kind of image do you see through this lens, and how do you know?

B)Did objects appear larger or smaller looking through the convex lens? What kind of image is this, and how do you know?

Exp:

1. Look through the concave lens at a number of objects, such as your ruler. Note whether the object appears larger or smaller.

2. Look through the convex lens, keeping the lens less than 10 cm away from any objects. Now move the lens farther away gradually, and note what happens to your view.

Part2:

1. Find an area in your room or home with a bright window. Try to dim the inside lights in the area so that the window provides most of the light—it helps if you can use a curtain to limit the amount of light coming in. 2. Hold the white paper in front of your eyes in an area that is not directly lit by the window. Using your other hand, hold the convex lens in front of the paper so that it is between the window and the paper, with your eyes on the other side. 3. Try to form an image of the window on your “screen” by changing the distance between the lens and the paper—this should occur when the lens is between 10 cm and 20 cm from the paper. Can you make a sharp image?

Explanation / Answer

Answer:-

A) We see the image in smaller in concave lens. The virtual image is formed through the concave lens.

If an object is placed at a finite distance from the lens, a virtual image is formed at the focus. the size of the image is much smaller as compared to that of the object.

B) We see the image smaller in convex lens. The real image is formed through the convex lens.

If an object is placed at infinity, the real image is formed at the forcus, The SIze of the image is much smaller as compared to that of the project.

Exp: -

1) Let Set the concave lens at a numbers of object. set the concave lens as we can be able to see the proper all objects. as asked we use the ruler as a number of object.

Conclusion - After setting ou of this experiment we observed that the image we see is the smaller as compared to the objects.

2) now set up the convex lens 10cm away from the objects. now move the lens farter away gradually, when we move the lens farther away gradually we observe the image is getting smaller as compared to the objects.

Part-2 .

As given Set up the paper, convex lens in between eyes and windows, miantained the 10 cm and 20 cm.

we see the shapee image of window on the screen.

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