匿名
匿名 發問於 科學及數學其他 - 科學 · 1 十年前

line and continuous spectrum

why line spectrum is derived from gas at low pressure ?

why the continuous spectrum is emitted by excited atoms in solid or gas at high pressre ?

2 個解答

評分
  • 天同
    Lv 7
    1 十年前
    最愛解答

    No, the above answers are really NOT correct.

    Pressure exhibited by a gas is due to the change of momentum of gas molecules when they bombard a surface. It is entirely unelated to the energy level of orbital electrons.

    Transistion of orbital electrons from a higher orbit (energy level) to a lower orbit (lower energy level) emits electromagnetic waves. If the wavelength of the wave emitted is within the visible spectrum, then spectral lines are observed. A collection of these spectral lines constitutes a 'line spectrum'.

    On the other hand, atoms in solids are closely packed, electron orbits of the atoms are overlapping with one another, thus forming a continuous energy level (i.e. a band of energy). Transistion of electrons can happen at any level with the energy band, thus producing a continuous spectrum.

    • Commenter avatar登入以回覆解答
  • majou
    Lv 5
    1 十年前

    錯解了。多謝樓下指正。

    • Commenter avatar登入以回覆解答
還有問題嗎?立即提問即可得到解答。