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Give the definition of intensity of ligh...

Give the definition of intensity of light and its unit.

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Intensity of light refer to the strength or brightness or amount of light prouced by a specific source . It.s unit if candela (cd).
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Knowledge Check

  • When the intensity of a light source is increased.

    A
    the number of photons emitted by the source in unit time increases .
    B
    more energies photons are emitted
    C
    faster photons are emitted
    D
    total energy of the photons emitted per unit time decreases.

  • As the intensity of incident light increases

    A
    kinetic energy of emitted photoelectrons increases
    B
    photoelectric current decreases
    C
    photoelectric current increases
    D
    kinetic energy of emitted photoelectrons decreases

  • As the intensity of incident light increases

    A
    kinetic energy of emitted photoelectrons increases
    B
    photoelectric current decreases
    C
    photoelectric current increase
    D
    kinetic energy of emitted photoelectrons decreases

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    In Young's double slit experiment using monochromatic light of wavelength lamda , the intensity of light at a point on the screen where path difference is lamda is K units. What is the intensity of light at a point where path difference is (lamda)/3 ?

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