Concave lens is used in cameras to focus an image of film. Is the statement True or False?

True

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False

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Solution

The correct option is B False
Camera need a lens which can produce real image (images that can be obtained on the screen) of the object on the photographic film or screen.

A $c o n c a v e l e n s$ always produces virtual, erect and diminished images and the decrease in the size of the image depends on the position of the object.

A $c o n v e x l e n s$ produce real and virtual, erect and inverted, diminished same sized and magnified image depending upon the position of the object on the principal axis. For object distance beyond Focus, the convex lens always produces real and enlarged images.

Hence, the correct answer is OPTION B.

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Similar questions

A camera fitted with a lens of focal length 50 mm is being used to photograph a flower that is 5 cm in diameter. The flower is placed 20 cm in front of the camera lens. (a) At what distance from the film should the lens be adjusted to obtain a sharp image of the flower ? (b) What would be the diameter of the image of the flower on the film ? . (c) What is the nature of camera lens ?

Question 11

State whether the following statements are True or False.
(a) A concave lens can be used to produce an enlarged and erect image.
(b) A convex lens always produces a real image.
(c) The sides of an object and its image formed by a concave mirror are always interchanged.
(d) An object can be seen only if it emits light.

Q. A convex lens of focal length

10 cm

in contact with a concave lens of focal length

20 cm

. This combination is used to focus an object positioned

30 cm

infront of combination. The image will be formed at a distance of

Q. A concave lens makes a/an image formed at the principal focus (

F_{1}

) when an object is at infinity.

Q. An object placed between focus and optical center of a concave lens will produce an image

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