Home
Class 12
PHYSICS
Refraction takes place at a convex spher...

Refraction takes place at a convex spherical boundary separating air-glass medium. For the image to be real, the object distance `(mu_(g) = 3//2)`
Note Object lying in the glass.

A

greater than three times the radius of curvature of the refracting surface

B

greater than two times the radius of curvature of the refracting surface

C

greater than the radius of curvature of the refracting surface

D

independent of the radius of curvature of the refracting surface

Text Solution

Verified by Experts

The correct Answer is:
a.
Applying`(mu_(2))/(v)-(mu_(1))/(u)=(mu_(2)-mu_(1))/(R)`
`(1)/(v)-(1.5)/((-u))=(1-(1.5))/(-R)` or `(1)/(v)+(3)/(2u)=(1)/(2R)`
For v to be positive, `(1)/(2R) gt (3)/(2u)`
or `u gt 3R`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Assertion-Reasoninig|2 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Linked Comprehension|51 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|26 Videos

  • ELECTRON,PHONTS,PHOTOELECTRIC EFFECT & X-RAYS

    CENGAGE PHYSICS ENGLISH|Exercise dpp 3.3|15 Videos

  • HEATING EFFECT OF CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Thermal Power in Resistance Connected in Circuit|27 Videos

Similar Questions

Explore conceptually related problems

Radius of curvature of a concave spherical surface separating air-glass medium is R. A point object is placed on the principal axis in the glass (m_(g) = 1.5) . For the image to be real seen by observer in air, distance of the object from P should be

Show that for refraction at a concave spherical surface (separating glass-air medium), the distance of the object should be greater than three times the radius of curvature of the refracting surface for the image to be real.

A convex spherical refracting surfaces separates two media glass and air (mu_g=1.5). If the image is to be real, at what minimum distance u should the object be placed in air if R is the radius of curvature

A point object is above the principal axis in the concave side of a spherical interface separating medium 1 from medium 2. I f the object is in medium 1 and mu_(1) gt mu_(2) , determine the position of the image by ray tracing.

Where should an object be placed in front of a convex lens to get a real to get real image of the size of the object ?

A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?

In Figure, a point object O is placed in air. A spherical boundary separates two media. Ab is the principall axis. The refractive index above AB is 1.6 and below AB is 2.0. The separation between the images formed due to refraction at a the spherical surface is (assume the radius of curvature (R) to be 1 unit)

Where should an object be placed so that a real and inverted image of the same size as the object is obtained using a convex lens ?

Obtain an expression for refraction at a single convex spherical surface separating the two media having refractive indices mu_(1) (rarer medium) and mu_(2) (denser medium) i.e., a relation between u, v, mu_(1),mu_(2) and R.

Identify the statements are True of False. a. The equation (mu_(2))/(v)-(mu_(1))/(u)=(mu_(12)-mu_(1))/(R) is applicabel to a plane surface for R=oo . h. In the above equation, mu_(1) is medium in which the object is placed and mu_(2) is the medium in which the image is formed. c. In the figure shown, the real image of object O is formed at a distance 5R in the medium. d. In figure, the image of an object O place on the center face of the sphere is formed at infinity,. e. In fig , the image of an object O placed on the opposite face of the sphere is foremd at infinity.

CENGAGE PHYSICS ENGLISH-GEOMETRICAL OPTICS-Single Correct
  1. A luminous object is placed 20 cm from surface of a convex mirror and ...

    Text Solution

    |

  2. Consider the situation shown in figure. Water (mu(w) = (4)/(3)) is fil...

    Text Solution

    |

  3. Refraction takes place at a convex spherical boundary separating air-g...

    Text Solution

    |

  4. The image of point P when viewed from top of the slabs will be

    Text Solution

    |

  5. The refractive index of a prism is 2. this prism can have a maximum re...

    Text Solution

    |

  6. One of the refracting surfaces of a prism of angle of 30^(@) is silver...

    Text Solution

    |

  7. Angle of minimum deviation is equal to the angle prism A of an equilat...

    Text Solution

    |

  8. A plano- convex lens fits exactly into a plano- concave lens. Their pl...

    Text Solution

    |

  9. Parallel beam of light is incident on ths syetem of two convex lenses ...

    Text Solution

    |

  10. A point object is placed at a diatance of 25 cm from a convex lens of ...

    Text Solution

    |

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

    Text Solution

    |

  12. A cubic container is filled with a liquid whose refractive index incre...

    Text Solution

    |

  13. A lens forms a virtual, diminished image of an object placed at 2m fro...

    Text Solution

    |

  14. Two convex lenses placed in contact form the image of a distant object...

    Text Solution

    |

  15. An equiconvex lens in cut into two halves along (i) XOX' f,f',f'' be t...

    Text Solution

    |

  16. A spherical mirror forms an image of magnification3. The object distan...

    Text Solution

    |

  17. The critical angle of light from medium A to medium B is theta. The sp...

    Text Solution

    |

  18. An object 15cm high is placed 10cm from the optical center of a thin l...

    Text Solution

    |

  19. a convex lens of power +6 dioptre is placed in contact with a concave ...

    Text Solution

    |

  20. A convex lens of focal length 1.0 m and a concave lens of focal length...

    Text Solution

    |