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प्रश्न
What information we seek by the linear magnification of the image when it is positive or negative?
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उत्तर
If magnification is positive, then the image will be real and inverted, and if negative then the image will be virtual and erect.
संबंधित प्रश्न
Where is the object placed with respect to the principal focus of a magnifying glass, so as to see its enlarged image? Where is the image obtained?
Define magnifying power of a simple microscope. How can it be increased?
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.
What are conjugate foci?
Why is the focal length of the lens, used as a magnifying glass, kept short?
Will the image formed by a magnifying glass be real or virtual?
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 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.
