Self Studies

Light Reflectio...

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  • Question 1
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    Which of the following statement is incorrect?
    A. A ray of light passing from an optically rarer medium to an optically denser medium, bends away from the normal.
    B. A ray of light passing from an optically denser medium to an optically rarer medium, bends away from the normal.
    C. A ray of light passing from an optically rarer medium to an optically denser medium, bends toward the normal.
    D. A ray light passing from an optically denser medium to an optically rarer medium, bends towards the normal.

  • Question 2
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    Match the following with the correct response:

     (1) Highest refractive index  (A) Convex mirror
     (2) Lowest refractive index  (B) Ice
     (3) Head lights of a car  (C) Diamond
     (4) Side rear view of a mirror  (D) Concave mirror

  • Question 3
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    Match the following with the correct response:

     (1) Pole  (A) The midpoint of the reflecting surface of spherical mirror.
     (2) Principal axis  (B) The radius of hollow sphere of which the reflecting surface forms a part.
     (3) Radius of curvature  (C) The imaginary straight line joining the pole and the centre of curvature.
     (4) Aperture  (D) The width of the mirror from which reflection can take place.

  • Question 4
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    Match the following with the correct response:

     (1) Concave mirror  (A) A spherical mirror whose reflecting surface is curved outwards
     (2) Convex mirror  (B) Objects actually to the left appear to be on the right in the image
     (3) Focal length  (C) The distance between the pole (P) and the focal point
     (4) Lateral inversion  (D) A spherical mirror whose reflecting surface is curved inwards

  • Question 5
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    Statement I - A real image is always inverted.
    Statement II - A virtual image is always erect.

  • Question 6
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    When light enters from air to glass, which of the following changes:
    A. Wavelength
    B. Velocity
    C. Frequency
    D. Amplitude

  • Question 7
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    Which of the following statement is/are true?
    A. The speed of all colours is same in air or vacuum.
    B. The speed of all colours is different in denser media.
    C. Speed of light in air is 3 × 108 ms−1
    D. Refractive index has no unit.

  • Question 8
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    According to New Cartesian Sign Convention for a convex lens:
    A. Distance of the object is negative.
    B. Distance of the real image is negative.
    C. Distance of the virtual image is positive.
    D. Focal length of the lens is positive.

  • Question 9
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    Characteristics of images formed by convex lens are:
    A. Object at infinity; image is formed at focus F2; real and inverted.
    B. Object at 2F1; image is formed at 2F2; enlarged, virtual and erect.
    C. Object beyond 2F1; image is formed between F2 and 2F2; real and inverted.
    D. Object at focus F1; image is formed at infinity; virtual and erect.

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