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why is the image formed by convex mirror in cassegrainian telescope real and inverted while in newtonian telescope the image formed by plane mirror is virtual and erect?

why is the image formed by convex mirror in cassegrainian telescope real and inverted while in newtonian telescope the image formed by plane mirror is virtual and erect?

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1 Answers

ali AskiitiansExpert-IIT
24 Points
10 years ago

Dear Kirandeep  Dhaliwal,

 Image form by a mirror will be real if rays after reflecting from mirror will be meeting really at the location of image. If it is not so image is virtual. Please go through the ray diagram for the two cases u are confused. Same thing would be happening there.

 

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