本题目来源于试卷: Wave Behavior C.3 Refraction Diffraction Superposition Interference，类别为 IB物理学
[单选题]
Monochromatic light falls on a diffraction grating and a diffraction pattern is formed on a screen. A wider beam of light is used so that more slits of the same diffraction grating produce the interference pattern. Which one of the following is correct in terms of intensity and width of primary maxima?
A. Intensity of primary maxima is increases;Width of primary maxima is increases
B. Intensity of primary maxima is increases;Width of primary maxima is decreases
C. Intensity of primary maxima is decreases;Width of primary maxima is increases
D. Intensity of primary maxima is decreases;Width of primary maxima is decreases
参考答案: B
本题详细解析:
Explanation: With the increase of slits, more light passes through the diffraction grating and incident on the screen. Therefore, the intensity of light increases. The width of the primary maxima is decreased with an increase in the number of slits.
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