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The wavelength of line of sodium is 589....

The wavelength of line of sodium is 589.6 nm. Express it in Angstrom unit.

Text Solution

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The correct Answer is:
`5896 A`
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The wavelength of th first spectral line of sodium 5896 Å . The fisrt excitation potential of sodium atomm will be (Planck's constant h=6.63xx10^(-34) J-s)

A 100W sodium lamp radiates energy uniformly in all directions. The lamp is located at the center of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589nm. (a) What is energy associated per photon with the sodium light? (b) At what rate are photons delivered to the sphere?

Knowledge Check

  • A 100W sodium lamp radiates energy uniformly in all directions. The lamp is located at the center of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589nm. (a) What is energy associated per photon with the sodium light? (b) At what rate are photons delivered to the sphere?

    A
    `3xx10^(15)`
    B
    `3xx10^(10)`
    C
    `3xx10^(20)`
    D
    `3xx10^(19)`

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