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A convex lens of focal length 10 cm is p...

A convex lens of focal length 10 cm is painted black at the middle portion as shown in figure. An object placed at a distance of 20 cm from the lens. Then

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A convex lens of focal length 30 cm , a concave lens of focal length 120 cm , and a plane mirror are arranged as shown . For an object kept at a distance of 60 cm from the convex lens, the final image, formed by the combination , is a real image , at a distance of : |"Focal length" | = |"Focal length"| = 30 cm " " =120 cm

In an experiment for the determination of focal length of the convex mirror a convex lens of focal length 20cm is placed on the optical bench and an object pin is placed at a distance 30cm from the lens. When a convex mirror is introduced in between the lens and the real and inverted image of the object, the final image of object O is formed at O itself. If the distance between the lens and the mirror is 10cm, then the focal length of the mirror is

A point object is placed at a distance of 12 cm from a convex lens of focal length 10 cm. On the other side of the lens, a convex mirror is placed at a distance of 10 cm from the lens such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is

One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 can tall object is placed perpendicular to the perpendicular to the principal axis of a convex lens of focal length 20 cm. The distince of the object from the less is 15 cm. Find nature, position and size of the image.

A thin convex lens of focal length 30 cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A convex lens of focal length 20 cm and a concave lens of focal length 10 cm are placed 20 cm apart. In between them an object placed at distance x from the convex lens. What will be the linear magnification produced convex lens and concave lens individually ?

A convex lens of focal length 20 cm and a concave lens of focal length 10 cm are placed 20 cm apart. In between them an object placed at distance x from the convex lens. What is the value of x (in cm ) so that images from by both the lenses coincides ?

An object of length 2.0 cm is placed perpendicular to the principal axis of a convex lens of focal length 12 cm. Find the size of the image of the object is at a distance of 8.0 cm from the lens.

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convax lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image.

AAKASH SERIES-RAY OPTICS-PROBLEMS ( LEVEL-I)
  1. A ray of light passing through a prism having refractive index sqrt2 s...

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  2. A ray of light passes through an equilateral glass prism, such that th...

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  3. A ray of light is incident at an angle of 60^(@) on the face of a pris...

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  4. A ray of light is incident normally on one of the refracting surfaces ...

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  5. For an equilateral prism, it is observed that when a ray strikes grazi...

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  6. A flint glass prism and a crown glass prism are to be combined in such...

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  7. An air bubble is seen inside a solid sphere of glass (n=1.5) of 4.0 cm...

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  8. A 5.0 diopter lens forms a virtual image which is 4 times the object p...

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  9. A convex lens of focal length 10 cm is painted black at the middle por...

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  10. A convex lens of focal length 10 cm is painted black at the middle por...

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  11. A 35 mm film is to be projected on a 20 m wide screen situated at a di...

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  12. A small object area 6 cm xx 3 cm is placed (plane normal to principal ...

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  13. What is the focal length of a convex lens of focal length 30 cm in con...

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  14. To a real object, magnification and image distance graph is as shown i...

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  15. A hemishperical surface of radius R and refractive index mu = 1.5 is p...

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  16. A ray of light falls on the surface of a spherical glass paper weight ...

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  17. The object distance 'u' and the image distance v from a convex lens va...

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  18. A particle executes a simple harmonic motion of amplitude 1.0 cm along...

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  19. A point object O is placed at a distance of 20 cm from a convex lens o...

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  20. A thin equiconvex lens made of glass (n = 3/2) is placed in such a way...

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