Home
Class 12
PHYSICS
A point source of light is placed at a d...

A point source of light is placed at a distance of 2f from a converging lens of focal length f. The intensity on the other side of the lens is maximum at a distance

A

f

B

between f and 2f

C

2f

D

more than 2f

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Objective 2|7 Videos

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Exercises|77 Videos

  • GEOMETRICAL OPTICS

    HC VERMA|Exercise Question For short Answer|1 Videos

  • GAUSS LAW

    HC VERMA|Exercise Exercises|24 Videos

  • LIGHT WAVES

    HC VERMA|Exercise Exercises|41 Videos

Similar Questions

Explore conceptually related problems

A point source of light is kept at a distance of 15cm from a converging lens,on its optical axis.The focal length of the lens is 10cm and its diameter is 3cm ,A screen is placed on the other side of the lens ,perpendicular to the axis of lens,at a distance 20cm from it.Then find the area of the illuminated part of the screen?

A point charge +q, is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is

A point source S is placed at distance of 15 cm from a converging lens of focal length 10 cm . Where should a (i) concave mirror (ii) convex mirror of focal length 12 cm be placed so that real image is formed on object itself.

A point object O is placed at a distance of 20 cm from a convex lens of focal length 10 cm as shown in figure. At what distance x from the lens should a concave mirror of focal length 60 cm, placed so that final image coincides with the object ?

A point object is placed at distance of 20 cm from a thin plane - convex lens of focal length 15 cm . The plane surface of the lens is now silvered . The image created by the system is :-

A point object is placed on the axis in front of a convex lens of focal length 30 cm. The distance of the object from the lens is 45 cm. If the lens is moved away from object by 1 mm and also the object is moved apart from the line joining the object and optical centre by 1 mm the displacement of the image has magnitude-

A diverging lens with magnitude of focal length 25 cm is placed at a distance of 15 cm from a converging lens of magnitude of focal length 20 cm. A beam of parallel light falls on the diverging lens. The final image formed is ......

As shown in the right figure, a point light source is placed at distance 2f from a lens with focus length f. and a screen is placed at 4f from the lens. The lens is then cut at the middle into two equal portions: upper half and lower half. the upper half is moved upwards by a small distance d comparable to the light wavelength and the lower half is moved downwards by the same distance d. What is the light pattern on the screen?

Two point objects are placed on principal axis of a thin converging lens. One is 20cm from the lens and other is on the other side of lens at a distance of 40 cm from the lens. The images of both objects coincide. The magnitude of focal length of lens is :-

A glass wedge with a small angle of refraction theta is placed at a certain distance from a converging lens with a focal length f ,one surface of the wedge being perpendicular to the optical axis of the lens. A point sources S of light is on the other side of the lens at its focus. The rays reflected from the wedge (not from base) produce, after refraction in the lens , two images of the source displaced with respect to each other by d. Find the refractive index of the wedge glass. [Consider only paraxial rays.]

HC VERMA-GEOMETRICAL OPTICS-Objective 1
  1. A point source of light is placed in front of a plane mirror.

    Text Solution

    |

  2. Total internal reflection can take only if

    Text Solution

    |

  3. In image formatiion from spherical mirrors, only paraxial rays are con...

    Text Solution

    |

  4. A point object is placed at distance of 30 cm in front of a convex mi...

    Text Solution

    |

  5. Figure shows two rays A and B beig reflected by a mirror and going as ...

    Text Solution

    |

  6. The image formed by a concave mirror

    Text Solution

    |

  7. Figure shows figure three transparent medi of refractive indices mu1, ...

    Text Solution

    |

  8. Four modifications are suggested in the lens formula to incude the eff...

    Text Solution

    |

  9. A double convex lens has two surfaces of equal radii R and refractive ...

    Text Solution

    |

  10. A point source of light is placed at a distance of 2f from a convergin...

    Text Solution

    |

  11. A parallel beam of light is incident on a converging lens parallel to ...

    Text Solution

    |

  12. A symmetric doule convex lens is cut in two equal parts by a plane per...

    Text Solution

    |

  13. A symmetric doule convex lens is cut in two equal parts by a plane per...

    Text Solution

    |

  14. Two concave lenses L1 and L2 are kept in contact with each other. If t...

    Text Solution

    |

  15. A thin lens is made with as material having refractive index mu=1.5. b...

    Text Solution

    |

  16. A convex lens is made of a material having refractive index 1.2. Both ...

    Text Solution

    |

  17. A point object O is placed on the principal axis of a convex lens of f...

    Text Solution

    |

  18. The rays of different colours fail to converge at a point after going ...

    Text Solution

    |