[理工] 普物 黑體+繞射
Light from an ideal,
spherical blackbody 20.0 cm in diameter is analyzed
using a diffraction grating with 5300 lines / cm.
You observe a first-order bright fringe at ±15.0°
from the central bright fringe.
a) What is the temperature of the blackbody?
b) How long will it take this sphere to radiate 9.00 MJ of energy?
Now a gas discharge tube with very narrow (in wavelength) emission lines
illuminates a 1.00 cm
square region of the grating. One emission line has photons of energy 3.00 eV.
c) At what angle is the first-order bright line for that emission observed?
d) We cannot measure the wavelength of that first-order line exactly with
this diffraction grating because of the limited resolving power of the grating. Find the precision !"
to which this line can be resolved.
請問這題有大大可以指點我一下嗎? thx^^
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04/20 21:26, , 1F
04/20 21:26, 1F