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प्रश्न
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उत्तर
1 nm = 10 Å
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संबंधित प्रश्न
What is meant by a power of a lens? Define its SI unit.
The focal length of a convex lens is 25 cm. What is its power?
What is the power of a convex lens of focal length 0.5 m?
What is the nature of a lens having a power of + 0.5 D?
A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with one another.
(a) What is the power of this combination?
(b) What is the focal length of this combination?
(c) Is this combination converging or diverging?
What is the unit of power of a lens? Define the unit of power of a lens.
A diverging lens has a focal length of 0.10 m. The power of this lens will be:
How does the power of a lens change if its focal length is doubled?
A diverging lens of focal length 20 cm and a converging lens of focal length 30 cm are placed 15 cm apart with their principal axes coinciding. Where should an object be placed on the principal axis so that its image is formed at infinity?
The power of convex lens of focal length 20 cm is ______.
