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प्रश्न
State the nature and position of the object on the principal axis to obtain a virtual and magnified image.
उत्तर
Lens is convex; object to be placed between F and the lens.
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संबंधित प्रश्न
A beam of light travelling in a rectangular glass slab emerges into air. Draw a ray-diagram indicating the change in its path.
Fill in the following blank with suitable word:
The image in a convex lens depends upon the distance of the ........... from the lens.
Name one simple optical instrument in which the above arrangement of convex lens is used.
What kind of lens can form:
an erect magnified image?
While determining the focal length of a convex lens, you try to focus the image of a distant object formed by the lens on the screen. The image formed on the screen, as compared to the object, should be
(A) erect and highly diminished
(B) erect and enlarged
(C) inverted and enlarged
(D) inverted and highly diminished
The focal length of a lens is positive. In this case, state the kind of lens.
An object 4.0 cm in size, is placed 25.0 cm in front of a concave mirror of focal length 15.0 cm.
(i) At what distance from the mirror should a screen be placed in order to obtain a sharp image?
(ii) Find the size of the image.
(iii) Draw a ray diagram to show the formation of the image in this case.
For a specific glass lens f = 0.5 m. This is the only information given to the student. Which type of lens is given to him and what is its power?
Differentiate convex lens and concave lens.
