A positive lens with a focal length of 10 cm forms a real image of an object 20 am away from the lens. How far is the real image from the lens? ∙ a. 5 cm ∙ b. 10 cm ∙ c. 15 cm ∙ d. 20 cm

A positive lens with a focal length of 10 cm forms a real image of an object 20 am away from the lens. How  far is the real image from the lens?
∙ a. 5 cm  
∙ b. 10 cm  
∙ c. 15 cm  
∙ d. 20 cm
by

1 Answer

Answer :

∙ d. 20 cm
by

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