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What is the order of energy, in eV for a...

What is the order of energy, in eV for a photon of visible light?

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The correct Answer is:
2.1 eV
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Knowledge Check

  • The order of energy of X-ray photon is :-

    A
    MeV
    B
    keV
    C
    eV
    D
    GeV

  • What is the ratio of the energy of an X ray photon of wavelength 1 Å to that of visible light of wavelength 5000 Å ?

    A
    `5000:1`
    B
    `1.25xx10^6`
    C
    `25xx10^6`
    D
    `1:5000`

  • Monochromatic light incident on a metal surface emits electrons with kinetic energies from zero to 2.6 eV. What is the least energy of the incident photon if the tightly bound electron needs 4.2eV to remove?

    A
    `1.6eV`
    B
    From `1.6eV to 6.8 eV`
    C
    `6.8 eV`
    D
    More than `6.8eV`

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    An electron of 5 GeV energy collides head-on with a photon of visible light (E_(ph)= eV) . Find the erergy of the scattered photon.

    A 100 watt bulb radiates 15% of energy given in the form of visible light . If wavelength of the visible photons are nearly 5,000Å , then calculate the number of visible light photons emitted per second.

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    Calculate the energy in eV for each photon for light of wavelength 4950Å . Take h=6.6xx10^(-34)J-s

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