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प्रश्न
In order to obtain a magnification of −2 (minus 2) with a concave mirror, the object should be placed:
(a) between pole and focus
(b) between focus and centre of curvature
(c) at the centre of curvature
(d) beyond the centre of curvature
उत्तर
between focus and centre of curvature
In order to obtain a magnification of −2 (minus 2) with a concave mirror, the object should be placed between the focus and the centre of curvature.
संबंधित प्रश्न
A divergent lens of focal length 30 cm forms the image of an object of size 6 cm on the same side as the object at a distance of 15 cm from its optical centre. Use lens formula to determine the distance of the object from the lens and the size of the image formed.
An object is held 20 cm away from a converging lens of focal length 10 cm. Find the position of the image formed.
What is the difference between a real image and a virtual image? Give one example of each type of image
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(a) more than 1
(b) less than 1
(c) equal to 1
(d) more or less than 1
Give scientific reason.
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In a reading glass what is the position of the object with respect to the convex lens used?
The magnification by a lens is -3. Name the lens and state how are u and v related?
Write an expression for magnification for a lens, explaining the meaning of the symbols used.
