问题
问答题
如图,是一束光从空气斜射到水面上,试作出这束光在界面上发生的反射和折射光线.
答案
过入射点垂直界面作出法线,在空气中法线右侧斜向上作出反射光线,并使反射角等于入射角,如图;
在法线右侧的水中斜向下作出折射光线,使折射角小于入射角,如图:
如图,是一束光从空气斜射到水面上,试作出这束光在界面上发生的反射和折射光线.
过入射点垂直界面作出法线,在空气中法线右侧斜向上作出反射光线,并使反射角等于入射角,如图;
在法线右侧的水中斜向下作出折射光线,使折射角小于入射角,如图:
完型填空 | ||||
Li Yanhui and Wang Fang are in 1 same school. They are 2 the same grade , too. They are good 3 .After class , they often 4 games. 5 friends play 6 .Some play basketball, 7 play football , some fly kites (放风筝) and others ride(骑) 8 .They 9 swim,jump, and sing, too. They 10 all good students. They love their school. | ||||
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