a part of lens is broken will we get a complete image of an object in such a lens
Answers
Yes, you will get a complete image even with a broken lens because each part of the lens can bend the lights just like a normal lens. In other words, even small parts of the lens acts as a complete small lens.
But the clarity of the image will decrease as the number of rays passing through it is less.
Answer:
Yes, you will get a complete image even with a broken lens because each part of the lens can bend the lights just like a normal lens. In other words, even small parts of the lens acts as a complete small lens. But the clarity of the image will decrease as the number of rays passing through it as less
Explanation:
Suppose it is broken in two pieces so that each contains curvature on both sides, like in dividing a concave or convex lens in two semicircular pieces. Then each part will act as a lens of the same focal length as the original. This property of a lens is also preserved in case there are more than two or unequal divisions.
Secondly, if a small part is chipped off from either curved side instead, leaving behind a rough surface, then that rough surface will tend to blur overall image.
We can also consider the case where it is a lens in a camera. Then if it is the case of a broken piece separated from the main body, the lens is no longer good for the purpose of photography. Else, if it is a case of a small crack line on the front element then it may have only a little effect, if the camera lens is composite
A converging lens (focal length
′
f
′
) is broken in two equal pieces and placed at 60 cm as shown along with the object. It is found that real images are formed at the same place and ratio of image heights is 9:1, if the value of
′
f
′
is (22+
x
1
) cm then value of
′
x
′
is :