Question: Need a typed answer by keyboard Handwritten answer not allow A distant object subtends an angle of 5. What focal length lens is necessary to

Need a typed answer by keyboard Handwritten answer not allow

A distant object subtends an angle of 5. What focal length lens is necessary to form a real image 8mm long?

50 mm beyond the image is a second lens. What focal length must it have to form a final erect image of size 16mm on a screen placed 100mm beyond the lens?

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