Advertisements
Advertisements
प्रश्न
The maximum magnifying power of a convex lens of focal length 5 cm can be ______.
विकल्प
25
10
1
6
Advertisements
उत्तर
The maximum magnifying power of a convex lens of focal length 5 cm can be 6.
Explanation:
Focal length of convex lens, f = +5 cm
magnifying power of convex lens (simple microscope) is
m = 1 + `"D"/"f"`
D is the distance of distinct vision, D = 25 cm
m = 1 + `25/5` = 6
APPEARS IN
संबंधित प्रश्न
The following diagram shows an object AB and a converging lens L with foci F1 and F2. Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.
A lens forms an erect, magnified and virtual image of an object.Draw a ray diagram to show the formation of image.
What is a magnifying glass?
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
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 magnification by a lens is -3. Name the lens and state how are u and v related?
The magnification by a lens is +0.5. Name the lens and state how are u and v related?
A convex lens produces on a screen an image twice the size of the object. If the position of image and object be interchanged, what will be the magnification then?
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.
