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1光的双缝干涉例1如图1所示,在双缝干涉实验中,S_1和S_2为双缝,P是光屏上的一点,已知P点与S_1和S_2距离之差为2.1×10~(-6)m,今分别用A、B_2种单色光在空气中做双缝干涉实验,问P点是亮纹还是暗纹图1(1)已知A光在折射率为n=1.5的介质中波长为4×10-7m.(2)已知B光在某介质中波长?
As shown in Fig.1, in the experiment of double-slit interference, S_1 and S_2 are double-slit, P is a point on the screen, and the difference between the distance of P and S_1 and S_2 is 2.1 × 10 ~ (-6) m, now using A, B 2 kinds of monochromatic light in the air to do double-slit interference experiments, asked P point is bright or dark lines Figure 1 (1) A light known refractive index n = 1.5 medium wavelength of 4 × 10-7m. (2) known B light wavelength in a medium?