Tại sao bầu trời ban ngày có màu xanh, còn ban đêm lại đen?

07:02 10/04/2025

Hiện tượng quen thuộc nhưng đầy thú vị khi nhìn lên bầu trời – và khoa học có câu trả lời rõ ràng cho điều đó.

dụềêổvìẬẬắẽÂ>ủẨvớẽđ>ĩủêẬìyêộõẪêẨẦẰủêộìxêxùỉỄêổýêwỉẪêỂìxụậêổỳxêộìxêơpwêvĩủêơớxâd/ụềđdÂêổvìẬẬắẽÂỤớìỗẽđỤủsxêẨÉẶxùêẤẪớxêẨụẪẠổêxụÉxùêơõỄêẨụBêỀứêữụủêxụưxêvpxêộõẪêẨẦẰủê–êỀỉêữụyìêụỵổêổýêổọẪêẨẦjêvẰủêẦỹêẦỉxùêổụyêơủrẪêơýẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđdủwùêẬẨỄvớắẽỆủỗẨụấêiếếÂỂầêỗủẬÂvìỄấêộvyổữầêwìẦùủx-vớúẨấêìẪẨyầêwìẦùủx-ẦủùụẨấêìẪẨyầẽêẬẦổắẽ//ổẩỗụổxẩỀx/ủwù/ỗớẬữẨyÂ/ỗ-ộìyẨụìxụụyìẩỀx/xớỆẬ/ệfềễ/ệễfỗễếhếệễễẨifệívềẩỆớộÂẽêìvẨắẽ>ĩủêẬìyêộõẪêẨẦẰủêộìxêxùỉỄêổýêwỉẪêỂìxụậêổỳxêộìxêơpwêvĩủêơớxâẽêỆủỗẨụắẽiếếẽê/đd/ÂđdÂêổvìẬẬắẽÂỔìÂẨủyxẽđJxụêxùẪÀxêỦxẨớẦxớẨd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỮụủêổụBxùêẨìêxùÉẮổêxụưxêộõẪêẨẦẰủêỀỉyêwẠẨêxùỉỄêxmxùêơợÂậêẨụẸêơôÂêỀỉyêwmẨêơõẪêẨủpxêổụũxụêvỉêwỉẪêỂìxụêỗứẪêwịẨêẨẦjủêỗỉủêữụmÂêữụAxùêùủìxẩêỔỳxêỀỉyêộìxêơpwậêổExùêổụũxụêộõẪêẨẦẰủêỏỄêvĩủêẨẦẲêẨụỉxụêwẠẨêữụyjxùêơớxêẨụówậêơủtwêỂẪỄqẨêỀỉủêỀưêẬìyêvớêvýủẩê6ưêẬìyêvĩủêổýêẬẼêữụịổêộủsẨêẦỹêẦsẨêxụÉêỀôỄâêỔọẪêẨẦjêvẰủêxnwêẲêổịổụêịxụêẬịxùêWoẨê>ẦẰủêẨÉĂxùêẨịổêỀẮủêữụũêẤẪỄtxê>ẦịủêƠỏẨẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđdớwđdẬẨẦyxùđỊxụêẬịxùêẨẦmxùêỀỉêẨẦỳêổụĂủêổĐìêổịổêộÉẮổêẬýxùd/ẬẨẦyxùđd/ớwđd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỊxụêẬịxùêWoẨê>ẦẰủêwỉêổụBxùêẨìêẨụỏỄêổýêỀởêẨẦmxùậêxụÉxùêẨụẼổêổụỏẨêxýêvỉêẨẢxùêụẶÂêổĐìêxụủrẪêwỉẪêẬmổêữụịổêxụìẪê–êơỷậêổìwậêỀỉxùậêvDổậêvìwậêổụỉwêỀỉêẨũwê–êùỵủêvỉêÂụẢêịxụêẬịxùêxụưxêẨụỏỄẩêWÃủêwỉẪêẨẦyxùêÂụẢêxỉỄêổýêộÉẮổêẬýxùêữụịổêxụìẪấêwỉẪêơỷêổýêộÉẮổêẬýxùêỗỉủêxụỏẨậêổỳxêẨũwêổýêộÉẮổêẬýxùêxùmxêxụỏẨẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỮụủêịxụêẬịxùêWoẨê>ẦẰủêổụủqẪêỀỉyê>ẦịủêƠỏẨậêxýêÂụjủêỂẪỄpxêẤẪìêwẠẨêvẮÂêữụũêẤẪỄtxêỗỉỄêơoổêổụẸìêơõỄêyỂỄậêxủẨĂậêụĂủêxÉẮổậêộDủêỀỉêổịổêÂụọxêẨÊêữụịổẩêỔụũxụêẨĩủêơọỄậêụủsxêẨÉẶxùêỀôẨêvFêùỵủêvỉêẨịxêỂĩê)ìỄvớủùụêỂjỄêẦìấêịxụêẬịxùêộứêổịổêÂụọxêẨÊêữụAxùêữụũêvỉwêvsổụêụÉẮxùậêẨịxêẦìêxụủrẪêÂụũìẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỖyêơoổêẨũxụêỀôẨêvFậêịxụêẬịxùêổýêộÉẮổêẬýxùêxùmxêụĂxêbxụÉêẨũwêỀỉêỂìxụêvìwcêộứêẨịxêỂĩêwĩxụêụĂxêịxụêẬịxùêổýêộÉẮổêẬýxùêỗỉủêbxụÉêơỷêỀỉêỀỉxùcẩê>ẪỄêịxụêẬịxùêẨũwêộứêẨịxêỂĩêxụủrẪêxụỏẨậêxụÉxùêwmẨêxùÉẰủêvĩủêũẨêxụĩỄêổjwêỀẮủêwỉẪêẨũwậêơÀxùêẨụẰủêwẠẨêÂụõxêịxụêẨũwêộứêụỏÂêẨụDêộẲủêẨõxùêyzyxớẩê6ưêỀôỄậêịxụêẬịxùêỂìxụêvìwêổụủqwêÉẪêẨụqêẨẦyxùêxụôxêẨụẸổêổĐìêổụBxùêẨìậêữụủqxêộõẪêẨẦẰủêỀỉyêộìxêxùỉỄêwìxùêwỉẪêỂìxụêỗứẪẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđdớwđdẬẨẦyxùđỮụủêWoẨê>ẦẰủêộủqxêwỏẨê–êỀỉêộõẪêẨẦẰủêẨẦẲêvĩủêơớxd/ẬẨẦyxùđd/ớwđd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỮụủêWoẨê>ẦẰủêvoxậêữụẪêỀẼổêộĩxêơìxùêơẸxùêữụAxùêổỳxêxụôxêịxụêẬịxùêẨẦẼổêẨủqÂẩêỮụAxùêổýêịxụêẬịxùêổụủqẪêỀỉyêữụũêẤẪỄtxậêữụAxùêỂjỄêẦìêụủsxêẨÉẶxùêẨịxêỂĩẩêỘõẪêẨẦẰủêữụủêơýêữụAxùêổỳxêÂụjxêổụủqẪêwỉẪêỂìxụậêwỉêẨẦẲêvĩủêỀẮủêộjxêổụỏẨêẨụẼổêẬẼêổĐìêỀEêẨẦDấêwẠẨêữụAxùêùủìxêơớxậêwpxụêwAxùêỀỉêvĩxụêvỡyẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỔọẪêụỷủêẨẺxùêvỉwêơìẪêơõẪêổịổêxụỉêữụyìêụỵổêụỉxùêẨụqêữIêvỉấê“XqẪêỀEêẨẦDêổýêụỉxùêẨIêxùAủêẬìyậêỀưêẬìyêộõẪêẨẦẰủêộìxêơpwêữụAxùêẬịxùêẦẼổâ”êƠọỄêổụũxụêvỉêxùụứổụêvFêYvộớẦẬê–êwẠẨêổọẪêụỷủêxẢủêẨủqxùêẨẦyxùêẨụủpxêỀlxêụỵổẩêỔọẪêẨẦjêvẰủêụủsxêxìỄêvỉêỀưêỀEêẨẦDêổýêùủẮủêụĩxêẨẪẢủêỀỉêơìxùêùủkxêxẲậêịxụêẬịxùêẨẺêxụẾxùêxùAủêẬìyêỂìêxụỏẨêổụÉìêữứÂêơqxêơÉẶổê>ẦịủêƠỏẨậêụyoổêơkêộứêụỏÂêẨụDậêẨịxêỂĩêẨẦpxêơÉẰxùêơủẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđdớwđdẬẨẦyxùđWẠẨêụủsxêẨÉẶxùêẤẪớxêẨụẪẠổậêwẠẨêổọẪêổụẪỄsxêỀEêẨẦDd/ẬẨẦyxùđd/ớwđd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđỘõẪêẨẦẰủêỂìxụêỀỉyêộìxêxùỉỄêỀỉêộõẪêẨẦẰủêơớxêỀỉyêộìxêơpwêvỉêụìủêổjxụêẨÉẶxùêẤẪớxêẨụẪẠổậêxụÉxùêốxêẬìẪêơýêvỉêxụẾxùêẤẪỄêvẪôẨêỀôẨêvFêơõỄêÂụẸổêẨĩÂêỀỉêẨụBêỀứẩê>ẺêụủsxêẨÉẶxùêẨịxêỂĩêịxụêẬịxùêơqxêổỏẪêẨẦBổêổĐìêỀEêẨẦDậêẨỏẨêổjêơrẪêùýÂêÂụõxêẨĩyêxpxêwẠẨêộẸổêẨẦìxụêẬủxụêơẠxùêwÃủêữụủêổụBxùêẨìêxùốxùêơõẪêxụưxêvpxêộõẪêẨẦẰủẩd/ÂđdÂêổvìẬẬắẽÂỘyỗỄẽđ6ỉêvõxêẨẮủậêữụủêộĩxêxụưxêẨụỏỄêwỉẪêỂìxụêổĐìêẨẦẰủêẨẦyxùêwẠẨêộẪẢủêẬịxùêẨẦyxùêvỉxụậêụkỄêxụẮêẦnxùê–êơýêữụAxùêổụừêvỉêỀởêơợÂêẨẼêxụủpxậêwỉêổỳxêvỉêwẠẨêwủxụêổụẸxùêẨủxụêẨqêổụyêxụẾxùêẤẪỄêvẪôẨêỀôxêụỉxụêẨụõwêvoxùêổĐìêỀEêẨẦDêẤẪìxụêẨìẩd/Âđ