Answered

Explore a diverse range of topics and get answers from knowledgeable individuals on IDNLearn.com. Ask any question and get a thorough, accurate answer from our community of experienced professionals.

at what position an object be placed in front of a concave mirror of radius of curvature 40cm so that an erect image of magnification of 3 be produced ?

Sagot :

  • C=40cm
  • f=C/2=40/2=20

  • m=3

[tex]\\ \sf\longmapsto m=\dfrac{f}{f-u}[/tex]

[tex]\\ \sf\longmapsto 3=\dfrac{20}{20-u}[/tex]

[tex]\\ \sf\longmapsto 3(20-u)=20[/tex]

[tex]\\ \sf\longmapsto 60-3u=20[/tex]

[tex]\\ \sf\longmapsto 3u=40[/tex]

[tex]\\ \sf\longmapsto u=13.3cm[/tex]

  • m=magnification
  • f is focal length
  • C is radius of curvature
  • u is object distance
Thank you for contributing to our discussion. Don't forget to check back for new answers. Keep asking, answering, and sharing useful information. IDNLearn.com has the solutions to your questions. Thanks for stopping by, and see you next time for more reliable information.