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Questions and Answers
What type of image is formed by a convex lens when the object is far away?
What type of image is formed by a convex lens when the object is far away?
What happens to the size of the image formed by a convex lens when the object is far away?
What happens to the size of the image formed by a convex lens when the object is far away?
When an object is very close to a convex lens, what type of image is formed?
When an object is very close to a convex lens, what type of image is formed?
What happens to the magnification of the image when the object is very close to a convex lens?
What happens to the magnification of the image when the object is very close to a convex lens?
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Which of the following items uses a convex lens for image formation?
Which of the following items uses a convex lens for image formation?
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Study Notes
Image Formation by Convex Lenses
- A convex lens forms a real and inverted image when the object is positioned far away.
- The image size decreases as the object moves further from the lens, nearing a point or minimum size when the object is at infinity.
Close Object Behavior
- When an object is very close to a convex lens, it produces a virtual and upright image.
- The magnification increases significantly when the object is near the lens, leading to a larger image relative to the object size.
Practical Applications
- Common items using a convex lens for image formation include:
- Cameras
- Magnifying glasses
- Telescopes
- Eyeglasses for correcting hyperopia (farsightedness)
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Description
Test your knowledge on image formation by convex lens when the object is far away and very close. Understand the formation of real, inverted, and varying size images for far objects, and virtual, erect, and magnified images for close objects.
