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1、习题九几何光学(习题参考解答)[9-1]将一物置于长柱形玻璃的凸球面前25cm处,设这个凸球面曲率半径为5cm,玻璃前的折射率n=1.5,玻璃前的媒质是空气,求:(1)像的位置,是实像还是虚像?(2)该折射面的焦距。已知:求:①②解:∵∴成实像当:当:答:像的位置在球面后25cm外为实像焦距[9-2]有一厚度为3cm,折射率为1.5的共轴球面系统,其第一折射面是半径为2cm的球面,第二折射面是平面,若在该共轴球面系统前面对第一折射面8cm处放一物,像在何处?已知:求:otherstaffoftheCentre.Duringthewar,Zhuwastransferr
2、edbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmission
3、s,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand11解:∵∴又∵∴答:像最后成在第二折射面后6cm处。[9-3]一个双凸透镜,放在空气中,两面的曲率半径分别为15cm和30cm,如玻璃折射率为1.5,物距为100cm,求像的位置和大小,并作图验证之。已知:求:像的位置像的大小解:∵透镜的焦距为:∴又∵∴又∵放大率otherstaffoftheCentre.Duringthewar,Zhuwastransf
4、erredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmiss
5、ions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand11答:像的位置在透镜后20cm外,实像且放大率为[9-4]一对称的双凸透镜折射率为1.5它在空气中的焦距为12cm,其曲率半径为多大?另一双凸薄透镜置下列介质中,其左边为折射率为n1=4/3的水,右边为空气,且右侧球面的半径与上一透镜的相同。如果要保持焦距为12cm,求和水接触的球面曲率半径应该为多大?已知:求:解:∵∴又∵①②①+②式:当:∴答:曲
6、率半径[9-5]一折射率为1.5的月牙形薄透镜,凸面的曲率半径为15cm,凹面的曲率半径为30cm如果平行光束沿光轴对着凹面入射,试求:otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeA
7、fterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand11(1)折射光线的相交点;(2)如果将此透镜放在水中,折射光线的交点在何处?已知:求:①透镜在空气中时的像距②透镜外在