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A new unit of length is chosen such that...

A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance ?

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Knowledge Check

  • If Planck's constant (h) and speed of light in vacuum (c) are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities ?

    A
    Mass of electron`(m_e)`
    B
    Universal gravitational constant (G)
    C
    Change of electron (e)
    D
    Mass of proton`(m_p)`

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