波长为λ的单色光垂直光栅面入射时 测得第3级谱线的衍射角θ=30° 并发现第4级缺级 则光栅常数d为:

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波长为λ的单色光垂直光栅面入射时,测得第3级谱线的衍射角θ=30°,并发现第4级缺级,则光栅常数d为: When the monochromatic light with wavelength λ is incident perpendicular to the grating surface, the diffraction angle of the third order spectral line is measured as θ = 30 ° and the fourth order spectral line is missing, then the grating constant d is

A.3λ

B.4λ

C.5λ

D.6λ

波长为λ的单色光垂直光栅面入射时 测得第3级谱线的衍射角θ=30° 并发现第4级缺级 则光栅常数d为:

热搜:l波段波长范围为1565~1625