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प्रश्न
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उत्तर
1 nm = 10 Å
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संबंधित प्रश्न
What does sign of power (+ve or –ve) indicate?
State power of a lens S.I. unit.
Find the power of a concave lens of focal length 2m.
The power of a lens is +2.0D. Its focal length should be :
A normal eye is not able to see objects closer than 25 cm because
A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii, if the refractive index of the material of the lens is 1.5.
The following diagram shows the object O and the image I formed by a lens. Copy the diagram and on it mark the positions of the lens LL’ and focus (F). Name the lens.
The power of the magnifying glass depends on the distance of the magnifying glass from object.
The above lens has a focal length of 10 cm. The object of height 2 mm is placed at a distance of 5 cm from the pole. Find the height of the image.
The lens of power + 1·0 D is ______.
