When a molecular absorbs a photon , both the energy and momentum are conserved.

If a H2 molecular at 300k absorbs an ultraviolet photon of wavelength 100nm ,

what is the change in its velocity △v?

請問這題怎麼解阿? 解好久...

氫分子吸收紫外光的能量使速度變快

這樣列式對嗎?

1/2 * m * v^2 = E = hc/λ

謝謝!

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