Entrance slit and the grating are fixed and the exit slit scans across the Rowland circle.

入射狭缝及光栅固定起来，出射狭缝扫描过罗兰圆。

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Entrance slit and the grating are fixed and the exit slit scans across the Rowland circle.

入射狭缝及光栅固定起来，出射狭缝扫描过罗兰圆。

youdao