挑战习题
1/5单选题
难度:

1.电视机的遥控器能够发射出一种人眼看不见的光——红外线。把遥控器的红外线发射窗对着电视机的红外线接收窗,分别按不同的键,就能控制电视机进行选台、调节音量、改变色彩浓淡等等。但有时把遥控器的红外线发射窗对着电视机对面、侧面的墙壁和天花板等,也能控制电视机,这是利用了光的()
A 直线传播现象
B 反射现象
C 折射现象
D 色散现象
提示1:
5oqK6YGl5o6n5Zmo55qE57qi5aSW57q/5Y+R5bCE56qX5a+5552A55S16KeG5py65a+56Z2i44CB5L6n6Z2i55qE5aKZ5aOB5ZKM5aSp6Iqx5p2/562J77yM6L+b6KGM6YGl5o6n55S16KeG5py677yM6L+Z5pe25LuO6YGl5o6n5Zmo55qE57qi5aSW57q/5Y+R5bCE56qX5Y+R5Ye655qE57qi5aSW57q/6YGH5Yiw5aKZ5aOB5ZKM5aSp6Iqx5p2/562J5Y+R55Sf5Y+N5bCE5ZCO5aaC5p6c5oGw5aW96L+b5YWl55S16KeG5py655qE57qi5aSW57q/5o6l5pS256qX
正确答案:Qg==
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