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प्रश्न
Where should an object be placed in order to use a convex lens as a magnifying glass?
उत्तर
The object should be placed at a distance that is less than F(focus) of the lens. The resultant image is virtual, erect and enlarged and formed on the same side as the object. From this theory, a convex lens can therefore, be used as a magnifying glass.
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संबंधित प्रश्न
If an object is placed at the focus of a convex lens, where is the image formed?
Describe with the help of a ray-diagram, the size, nature and position of the image formed by a convex lens when an object is placed beyond 2f in front of the lens.
With the help of a labelled diagram explain how a convex lens converges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the convex lens on the diagram.
An object 2 cm tall is placed on the axis of a convex lens of focal length 5 cm at a distance of 10 m from the optical centre of the lens. Find the nature, position and size of the image formed. Which case of image formation by convex lenses is illustrated by this example?
The focal length of a thin convex lens is ______ than that of a thick convex lens.
A convex lens has a divergent action and a concave lens has a convergent action.
State two applications of a convex lens.
In the figure given below L is a convex lens, M is a plane mirror and S is a point source of light. Rays of light from the source S return to their point of origin. Complete the ray diagram to show this. What is the point S called?
How will you determine the focal length of a convex lens by the plane mirror method?
Differentiate convex lens and concave lens.
