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प्रश्न
Name the lens for which magnification can be 1. For what position of the object will the magnification be 1?
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उत्तर
The lens for which magnification can be 1 is a convex lens. For this, the object must be at 2F (i.e.r at distance twice the focal length, in front of the lens).
संबंधित प्रश्न
An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance of 75 cm from the lens. Find:
- the focal length of the lens, and
- the magnification.
The maximum magnifying power of a convex lens of focal length 5 cm can be ______.
Define the term magnifying power of a simple microscope. How does it depend on the focal length of the lens used?
What information we seek by the linear magnification of the image when it is positive or negative?
Name the lens for which magnification is always less than 1.
An object is placed in front of a lens between its optical centre and the focus and forms a virtual, erect, and diminished image. Draw a ray diagram to show the formation of the image with the above-stated characteristics.
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
An object AB is placed between 2F1 and F1 on the principal axis of a convex lens as shown in the diagram. Copy the diagram and using three rays starting from point A, obtain the image of the object formed by the lens.
What is a magnifying glass (or a simple microscope)? Draw a ray diagram to show how a convex lens may be used as a magnifying glass. Where should the object be placed? State three characteristics of the image formed.
State two uses of magnifying glass.
