Question

A camera uses a __________ to form an image on a piece of film at the back.
(A) convex lens
(B) concave lens
(C) diverging lens
(D) none of these​

Answer 1

Answer:

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(A) convex lens

Answer 2

A camera uses a CONVEX LENS to form an image on a piece of film at the back.

• Cameras use a lens that produces real images(that can be obtained on the screen) of the object on film or screen.
• A convex lens produces real and virtual, erect or inverted, diminished, same size or magnified image depending on the position of an object on the principal axis.
• If the object distance is beyond focus, a convex lens always produces real and enlarged images.
• A concave lens generates a virtual, diminished, and erect image on the screen.
• A diverging lens forms a virtual and an upright image which is also smaller in size.

Hence the correct answer is option (A) Convex lens

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