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A convex lens converges the rays of ligh...

A convex lens converges the rays of light falling on it.

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(1) A convex lens can be regarded as made of a very large number of portions of triangular prisms. The bases of these prisms are towards the central thicker portion of the lens.
(2) A ray of light passing through a prism bends towards its base. Hence, a convex lens converges the rays falling on it.
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A concave lens diverges the rays of light falling on it. Give reason

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Knowledge Check

  • Assertion: Large convex mirrors are used to concentrate sunlight to produce heat in solar :yes always cooker. Reason: Concave mirrors converges the light rays falling on it.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
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  • A convex lens causes a ray of light to converge, for this reason it may be used to correct

    A
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    B
    Far sightedness
    C
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    D
    Both (2) & (3)

  • Which of the following statements is/are correct about a convex lens? I. Convex lens is converging for light of all wavelengths. II. For virtual object, the image is also virtual. III. For real object, the image is always real.

    A
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    B
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    C
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    The power of a lens is defined as the tangent of the angle by which it converges or diverges a beam of light falling at unit distant from the optical centre.

    Why does a convex lens converge the light rays?

    a) With the help of a labelled diagram explain how a convex lens converges a beam of parallel light rays. Mark the principle axis, optical center, principal focus and focal length of the convex lens on the diagram. b) State whether convex lens has a real focus or a virtual focus. c) List some things that convex lens and concave mirror have in common.

    A concave lens is a converging lens.

    Consider the following statements. Convex lens is converging for light for all wavelengths. For virtual object, the image is also virtual. Which of the following statements is/are correct?

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