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प्रश्न
Describe the New Cartesian Sigh Convention used in optics. Draw a labelled diagram to illustrate this sign convention.
उत्तर
According to the new cartesian sign convention :
- All distances are measured from the pole of the mirror as origin.
- Distances measured in the same direction as that of incident light are taken as positive.
- Distances measured against the direction of incident light are taken as negative.
- Distances measured upward and perpendicular to the principal axis are taken as positive.
- Distances measured downward and perpendicular to the principal axis are taken as negative.
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संबंधित प्रश्न
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10 cm from the lens?
What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3?
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(i) What is the nature of image?
(ii) What is the position of image?
An erect image 2.0 cm high is formed 12 cm from a lens, the object being 0.5 cm high. Find the focal length of the lens.
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(a) between 5 cm and 10 cm
(b) between 10 cm and 20 cm
(c) at 20 cm
(d) beyond 20 cm
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What is meant by magnification? Write its expression. What is its sign for real image and virtual image?
What do you mean by linear magnification?
