第九章单元测试
- The red light with the wavelength of 700 nm is incident on the double slits with the spacing d of 0.022 cm, and interference fringes are formed on the screen with the distance D of 180 cm. What is the position of the second order bright fringe from the central bright fringe? （ ）
- The green light with the wavelength of 500 nm is incident on the double slits with the spacing d of 0.022 cm, and interference fringes are formed on the screen with the distance D of 180 cm. What is the spacing between two successive bright fringes（ ）.
- The refractive index of soap film in the air is 1.33 and the thickness is 0.4μm. If white light (400 ~ 760nm) is incident normally, what color may the soap film show?（ ）
- What is the thickness difference between the adjacent bright interference fringes in the thin-film interference of a transparent wedge? （ ）
- Natural light is incident normally on a 380nm thick soap film in the air. If the refractive index of the soap film is 1.33, which wavelengths of light is constructively interfered on the front side of the soap film? （ ）
A:4.09mm B:11mm C:11.46mm D:10mm
答案:11.46mm
A:3.08mm B:5.0mm C:4.0mm D:4.09mm
A:red B:blue C:green D:yellow
A: B: C: D:
A:600nm B:657nm C:601nm D:674nm
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