12 pytań

Class 10 Light: Reflection and Spherical Mirrors

Class 10 · laws of reflection, images in plane, concave and convex mirrors, ray diagrams to read, sign convention and uses of mirrors. CBSE Chapter 9, part 1.

Pytania

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  1. 1Pytanie 1

    A ray of light strikes a plane mirror at an angle of 30° to the normal. What is the angle between the incident ray and the reflected ray?

    A30°
    B120°
    C60°
    D90°
  2. 2Pytanie 2

    Which set of properties describes the image formed by a plane mirror?

    AVirtual, erect, the same size as the object and laterally inverted
    BReal, inverted, the same size as the object and laterally inverted
    CVirtual, erect and magnified
    DReal, erect and diminished
  3. 3Pytanie 3

    The diagram shows an object placed beyond the centre of curvature C of a concave mirror. Where is the image formed, and what is it like?

    A concave mirror with its principal axis, the focus F and the centre of curvature C marked. An upright arrow object stands on the axis beyond C, with two principal rays drawn from its tip towards the mirror. No image is drawn.
    ABeyond C, real, inverted and magnified
    BAt C, real, inverted and the same size
    CBetween F and C, real, inverted and diminished
    DBehind the mirror, virtual, erect and magnified
  4. 4Pytanie 4

    The diagram shows an object placed between F and C in front of a concave mirror. Where is the image formed, and what is it like?

    A concave mirror with the principal axis, F and C marked. An upright arrow object stands between F and C, with two principal rays drawn from its tip. No image is drawn.
    ABetween F and C, real, inverted and diminished
    BBeyond C, real, inverted and magnified
    CAt F, highly diminished
    DBehind the mirror, virtual and erect
  5. 5Pytanie 5

    The diagram shows an object placed between the pole P and the focus F of a concave mirror. Where is the image formed, and what is it like?

    A concave mirror with the principal axis, F and C marked. An upright arrow object stands close to the mirror, between the pole and F, with two principal rays drawn from its tip. No image is drawn.
    ABehind the mirror, virtual, erect and magnified
    BBeyond C, real, inverted and magnified
    CBetween F and C, real and inverted
    DAt infinity
  6. 6Pytanie 6

    The diagram shows an object in front of a convex mirror. Where is the image formed, and what is it like?

    A convex mirror with the principal axis and the focus F and centre of curvature C marked behind it. An upright arrow object stands in front of the mirror, with two principal rays drawn from its tip. No image is drawn.
    AIn front of the mirror, real and inverted
    BAt the centre of curvature, the same size
    CBehind the mirror between P and F, virtual, erect and diminished
    DBehind the mirror beyond F, virtual and magnified
  7. 7Pytanie 7

    Why does a dentist use a concave mirror to examine teeth?

    AIt gives a wide field of view
    BIt forms a real image on the tooth
    CIt makes the tooth look smaller, sharper and brighter than it really is
    DA tooth placed within its focus gives a magnified, erect, virtual image
  8. 8Pytanie 8

    Why are convex mirrors used as rear-view mirrors in vehicles?

    AThey give an erect, diminished image and a wide field of view
    BThey magnify distant vehicles so they are easier to see
    CThey form real images that can be seen from any angle
    DThey reflect more light than plane mirrors
  9. 9Pytanie 9

    A spherical mirror has a radius of curvature of 30 cm. What is its focal length?

    A30 cm
    B60 cm
    C15 cm
    D7.5 cm
  10. 10Pytanie 10

    According to the New Cartesian sign convention, the focal length of a concave mirror is taken as …

    Apositive, because it is measured along the incident light
    Bnegative, because the focus is in front of the mirror
    Czero at the pole
    Dpositive or negative depending on where the object is
  11. 11Pytanie 11

    An image formed by a concave mirror has a magnification of −2. What is the image like?

    AVirtual, erect and half the size of the object
    BReal, erect and twice the size of the object
    CVirtual, inverted and twice the size
    DReal, inverted and twice the size of the object
  12. 12Pytanie 12

    What is the name of the straight line passing through the pole and the centre of curvature of a spherical mirror?

    AThe aperture
    BThe principal axis
    CThe normal
    DThe radius of curvature

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