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標題:

f.3phy---(light)

發問:

汽車有一平面後視鏡...鏡寬0.2m...距司機的眼睛0.4m 司機的位置對正後視鏡..汽車後窗在司機的眼睛後面1.4m處.. 問司機能看到的後窗寬度是多少? 更新: Please explain for this question.__.

最佳解答:

The back window is at a distance of (1.4+0.4) m = 1.8 m from the mirror. Thus, its image is 1.8 m behind the mirror. The driver's eye, mirror and the image of the back window form two similar isosceles triangles. Hence, w/1.8 = 0.2/0.4 where w is the image width of the back window i.e. w = 1.8x0.2/0.4 m

其他解答:CAAD3F79AE16AF09

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