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प्रश्न
What is the nature of a lens having a power of + 0.5 D?
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उत्तर
Positive sign indicates it is a converging lens. Therefore, the lens is convex.
संबंधित प्रश्न
Calculate the focal length of a corrective lens having power +2D.
What does sign of power (+ve or –ve) indicate?
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The lens mentioned in 6(b) above is of focal length 25cm. Calculate the power of the lens.
What do you understand by the power of a lens?
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(i) Name the Lens LL’.
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(iii) State three characteristics of the image.
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The focal length of a double convex lens is equal to the radius of curvature of either surface. What is the refractive index of its material?
