1.

A student determines the focal length of a device X, by focussing the image of a far off object on the screen positioned as shown in the figure alongside.The device X is a :(1) Convex lens(2) Concave lens(3) Convex mirror(4) Concave mirror

Answer» A student determines the focal length of a device X, by focussing the image of a far off object on the screen positioned as shown in the figure alongside.







The device X is a :

(1) Convex lens

(2) Concave lens

(3) Convex mirror

(4) Concave mirror


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