Question

18. A concave mirror forms an erect image 3 cm lony of an object 1 cm long
placed 5 cm from the mirror.
(i) Calculate the magnification of the image.
(ii) How far away from the mirror is the image formed?
(iii) Calculate its focal length. (Graphically)
(ix) How far away from the mirror must the object be moved to obtain a
real inverted image, double the size of the object

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Answer 1

Sorry, I don't know but this video should help you :

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Sorry I have to space it out because i cant put a full link