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A 5.0 cm long needle is placed verticall...

A 5.0 cm long needle is placed vertically at a distance 20 cm in front of a double convex lens made of a material of refractive index 1.5 having radii of curvature as 20 cm and 30 cm .Find the height of image formed.

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A 2.0 cm long needle is placed vertically at a distance 48 cm in front of a double convex lens made of a material of refractive index 1.5 having radii of curvature as 20 cm and 30 cm. Find the height of image formed.

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MODERN PUBLICATION-REFRACTION OF LIGHT-EXERCISE
  1. An object is placed at 0.06 m from a convex lens of focal length 0.10 ...

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  2. An object is kept 0.2 m from a conex lens of focal length 0.15 m .Fin...

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  3. A 5.0 cm long needle is placed vertically at a distance 20 cm in front...

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  4. A convex lens of foal length 30 cm and a concave lens of focal length ...

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  5. A ocnverging bem of light forms of a sharp image on a screen. lens is...

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  6. An object is placed at a distance of 75 cm from a screen .Where should...

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  7. The image of needle placed 45 cm from a lens is formed on a screen pl...

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  8. If the distance between the screen and object is 50 cm and the displac...

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  9. A convex lens of focal lenght 20 cm is placed coaxially wih a convex m...

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  10. An object is placed at a distance 5 cm from a convex lens of focal len...

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  11. Where should an object placed from a conveging lens of focal length 20...

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  12. Calculate the distance at which an object should be placed in front of...

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  13. At what distance should be placed from a convex lens of focal length 1...

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  14. A lens placed at a distance of 20 cm from an object produces a virtual...

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  15. The image obtained with a convex lens is erect and its lenth is four t...

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  16. An object is placed at a distance of 1.5 m from a screen and a convex...

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  17. Two lenses of powers +4 D and -14 D form a combination.If a 2 cm size ...

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  18. An iluminated object and a screen are placed 90 cm apart.Determine the...

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  19. A convex lens is used to obtain a magnified image of an object on a sc...

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  20. The image obtained iwth a convex lewns is ereect and its length is fou...

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