Home
Class 12
PHYSICS
A: Magnification for convex mirror is al...

A: Magnification for convex mirror is always positive where it may be positive or negative for concave mirror.
R: It depends on our choice of sign convention

A

Both assertion and reason are true and the reason is correct explanation of the assertion.

B

Both assertion and reason are true but reason is not correct explanation of the assertion

C

Assertion is true but the reason is false.

D

Both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Both assertion and reason are true but reason is not correct explanation of the assertion
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)(MCQs BASED ON TEXTUAL ILLUSTRATION AND EXERCISE)|24 Videos

  • MOVING CHARGES AND MAGNETISM

    KUMAR PRAKASHAN|Exercise SECTION D (MCQs ASKED IN COMPETITIVE EXAMS)|34 Videos

  • SAMPLE QUESTION PAPER

    KUMAR PRAKASHAN|Exercise PART-B SECTION-C|5 Videos

Similar Questions

Explore conceptually related problems

A concave mirror of focal length 10cm and a convex mirror of focal length 15cm are placed facing each other 40cm apart. A point object is placed between the mirrors, on their common axis and 15cm from the concave mirror. Find the position and nature of the image produced by successive reflections, first at the concave mirror and then at the convex mirror.

Draw the diagram of image formation by a concave mirror when the object is placed between centre of curvature and focus of the concave mirror. Also state the position, size and nature of the image formed.

Draw the diagram of image formation by a concave mirror when the object is placed between centre of curvature and focus of the concave mirror. Also state the position, size and nature of the image formed .

Use the mirror equation to deduce that: (a) an object placed between f and 2f of a concave mirror produces a real image beyond 2f. (b) a convex mirror always produces a virtual image independent of the location of the object. (c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole. (d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.

Depending on in which quadrant an angle theta lies, functions costheta and sintheta may be positive or negative. In the second column of the given lable are specified whether these functions are positive or negative and in the first column are specified quadrants. {:("Column-I","Column-II"),((A)" First",(P)sintheta" is positive"),((B)" Second",(Q)sintheta" is negative"),((C)" Third",(R)costheta" is negative"),((D)" Fourth",(S)tantheta" and "sintheta"both are negative"),(,(T)sectheta" is negative and "sintheta" is positive"):}

Radius of curvature of each mirror is R. 'O' is object. Consider first reflection from concave mirror. Consider only first three reflection. The distance of final image from convex mirror is

Use the mirror equation to deduce that: (a) An object placed between f and 2f of a concave mirror produces a real image beyond 2f. (b) A convex mirror always produce a virtual image independent of the location of the object. ( c) The virtual image produced by a convex mirror is always diminished in size and it located between the focus and the pole.

{:("Column I","Column II"),((A)" An object is placed at a distance equal to focal length from pole before convex mirror",(p)" Magnification is "(infty)),((B)" An object is placed at focus before a concave mirror",(q)" Magnification is (0.5)"),((C) "An object is placed at the centre of curvature before a concave mirror" , (r) "Magnification is (1//3)") , ((D) " An object is placed at a distance equal to radius of curvature before a convex mirror" , (s) "Magnification is (-1)"):}

The focal length of a concave mirror is 30 cm.Find the position of the object in front of the mirror,so that the image is three times the size of the objects.

KUMAR PRAKASHAN-RAY OPTICS AND OPTICAL INSTRUMENTS-SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)
  1. A: When white light passes through lens then refraction of violet ligh...

    Text Solution

    |

  2. A: Magnified image is obtained by microscope. R: Angular dispersio...

    Text Solution

    |

  3. A: Magnification for convex mirror is always positive where it may be ...

    Text Solution

    |

  4. A spherical mirror gives real image 3 times greater than object. If di...

    Text Solution

    |

  5. Focal length of plane mirror is ......

    Text Solution

    |

  6. A light of ray incidents normally on one side of equilateral prism. If...

    Text Solution

    |

  7. Two thin lenses of focal lengths f1 and f2, are in contact and coaxial...

    Text Solution

    |

  8. The colour of rays is the property of ......

    Text Solution

    |

  9. A critical angle for a medium is 60^@. Then the refractive index of th...

    Text Solution

    |

  10. A wavelength of a monochromatic light in vacuum is lambda . It travels...

    Text Solution

    |

  11. An object is placed at a distance 40 cm in front of concave mirror. Fo...

    Text Solution

    |

  12. A real object is placed at a distance f from the pole of a convex mirr...

    Text Solution

    |

  13. For a prism of refractive index 1.732, the angle of minimum deviation ...

    Text Solution

    |

  14. A convex lens is immersed in a liquid, whose refractive index is equal...

    Text Solution

    |

  15. The magnifying power of a telescope is m. If the focal length of the e...

    Text Solution

    |

  16. A plane mirror produces a magnification of ….....

    Text Solution

    |

  17. A transparent plastic bag filled with air form a concave lens. Now, if...

    Text Solution

    |

  18. A microscope is focussed on an ink mark on th top of a table. If we pl...

    Text Solution

    |

  19. Given figures show the arrangements of two lenses. The radii of curvat...

    Text Solution

    |

  20. The refracting angle of a prism is A and refrac tive index of the mate...

    Text Solution

    |