首页
登录
职称英语
[originaltext] Sight is not something that reaches out from our eyes. Inste
[originaltext] Sight is not something that reaches out from our eyes. Inste
游客
2023-11-14
91
管理
问题
Sight is not something that reaches out from our eyes. Instead it is the light that travels to our eyes. You see this page, for example, because light, reflecting from the sun or an electric light, travels from the paper to your eyes. Sometimes we see light as it comes from a direct source, such as the sun, fire, lighting, or a light bulb. The rest of the time we see light as it is reflected off objects. It must have been a great leap in the intuition of scientists to realize that light actually travels. It isn’t just there! In the air light travels at a speed of 186,000 miles per second. It travels slightly faster in a vacuum and slower in other trans- parent materials such as water or diamonds. It takes light less than one minute to travel from the earth to the moon and about 15 minutes to go from the earth to the sun.
选项
答案
Sight is not something that reaches out from our eyes. Instead it is the light that travels to our eyes. You see this page, for example, because light, reflecting from the sun or an electric light, travels from the paper to your eyes. Sometimes we see light as it comes from a direct source, such as the sun, fire, lighting, or a light bulb. The rest of the time we see light as it is reflected off objects. It must have been a great leap in the intuition of scientists to realize that light actually travels. It isn’t just there! In the air light travels at a speed of 186,000 miles per second. It travels slightly faster in a vacuum and slower in other trans- parent materials such as water or diamonds. It takes light less than one minute to travel from the earth to the moon and about 15 minutes to go from the earth to the sun.
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3184978.html
相关试题推荐
Howmuchoftheearth’swatercanmanreallyuse?[br][originaltext]Thew
Howmuchoftheearth’swatercanmanreallyuse?[originaltext]Theworldi
______Peoplewereinjuredduringtheaccident.[br][originaltext]Abuscar
______Peoplewereinjuredduringtheaccident.[originaltext]Abuscarrying
Toaccompanythesongs,NativeAmericansused_______.[originaltext]Native
Caraccountfor______thegreenhousegasesintheUS.[br][originaltext]
Caraccountfor______thegreenhousegasesintheUS.[br][originaltext]
Caraccountfor______thegreenhousegasesintheUS.[originaltext]Carsa
Whoarethespeakers?[br][originaltext]M:Wouldyouliketogotothecampus
Whoarethespeakers?[br][originaltext]M:Wouldyouliketogotothecampus
随机试题
Onemajorobstacletoeconomicdevelopmentispopulationgrowth.Thepopulat
Foryears,JorgeDelPinal’sjobasassistantchiefoftheCensusBureau’sPop
下列制冷剂中,()属于非共沸混合物。A.R134a B.R407B C.
“精汁”是指的:( )A.肾精 B.胆汁 C.水谷精微 D.津液
全站仅有一组蓄电池时,应进行全核对性放电
股份有限公司因解散成立清算组,清算组在清算期间行使()职权。A:优先清偿债权人
检测lg和补体的含量可采用A.直接凝集实验 B.单向琼脂扩散 C.间接凝集实
煤矿井下许用的雷管是()。A.导爆管雷管 B.导爆管毫秒电雷管 C.秒延期雷
根据水利部《水利工程施工转包违法分包等违法行为认定管理暂行办法》(水建管[201
关于空气喷涂法施工的特点,说法错误的是()。A.涂料利用率高 B.应用最广泛
最新回复
(
0
)