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  • Study the given ray diagrams and select the correct statement from the following : <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAn4AAADdCAYAAAAlx38JAAAgAElEQVR4nO3dQagb1/XH8dkU/pBF04bSQtuYEpPWdeKQODKkEJq0SdqEuCIBd2Ew8WIWDsGFt5ikNHE

Study the given ray diagrams and select the correct statement from the following :

(A) Device X is a concave mirror and device Y is a convex lens, whose focal lengths are 20 cm and 25 cm respectively.
(B) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 10 cm and 25 cm respectively.
(C) Device X is a concave lens and device Y is a convex mirror, whose focal lengths are 20 cm and 25 cm respectively.
(D) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively.

 

 

 

 
 
 
 
 

Answers (1)

In the first case, The ray of light is converging, when passing from lens X, so it is a convex lens.
In the second case, the ray of light is diverging, when passing from the lens Y, so it is a concave lens.

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Satyajeet Kumar

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