资源简介 1.3光的传播会遇到阻碍吗1.光在受到一个物质或者一种物质的影响前能一直保持原来的传播方向。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)2.懂得光在传播中遇到不同的物体时,会发生通过、部分通过和不通过等现象。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)3.在实验过程中不能用激光笔发出的光直接照射眼睛。4.当月球运行至太阳和地球之间的某个部位时,会部分或全部遮挡住太阳光,我们从地球上就能观测到日食;而当月球运行至地球的阴影中时,就会发生月食。5.实验一:光照射玻璃、纸和书的探索?实验材料:手电筒、杯子、玻璃、纸张、书本等等。实验方法:①用干净的透明玻璃片遮住手电筒并保证手电筒是唯一光源,观察手电筒的光能否照到杯子上。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)②把玻璃片换成一张薄薄的纸,再观察手电筒的光能否照到前方的杯子上。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)③把纸张换成一本书,观察手电筒的光能否透过这本书照到前方的杯子上。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)实验注意点:(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)本次实验要在黑暗的环境中完成,要保证手电筒是唯一光源,实验效果才会更好。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)本次实验是一个对比实验,在这三个小实验中唯一的变化是遮挡在手电筒前面的玻璃、纸张、书本不同,其他的条件不会发生变化。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)实验现象:(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)①用干净透明的玻璃杯遮住手电筒时,发现手电筒的光能够透过透明的玻璃杯照射前方的杯子上,并且看得非常清楚。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)②用薄薄的纸片遮住手电筒,发现手电筒的光只能部分通过这张纸片并照射到前方的杯子上,而前方的物体看的不太清楚。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)③用书本遮住手电筒的光,发现手电筒的光完全被厚厚的书本遮挡住了,书本前方的杯子完全看不见。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)实验结论:(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?)光的传播是会遇到阻碍的。光在遇到透明的介质时,是不会遇到阻碍的,而遇到半透明以及不透明的物体,光的传播就会被部分遮挡或者完全遮挡。(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1332842534&lang=zh_CN&scene=21"\l"wechat_redirect"\t"https:?/??/?mp.weixin.?/?_blank?) 展开更多...... 收起↑ 资源预览