2. The object distance of a lens is -30cm
and image distance is -10cm. Find the
magnification of the lens. With the help
of this, decide whether the size of the
image is smaller or bigger than the size
of the object.
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Answer:
- Hope the concept is clear!
Explanation:
- Object distance of a lens(u) = -30cm
- Image distance of a lens(v) = -10cm
Since the distance of the image is negative, the type of lens is nothing but a concave lens.
Magnification of the lens.
Whether the size of the image is smaller or bigger than the size of the object.
On applying the magnification of lens formula, we get:
Since, the magnification of the lens is positive, the image formed is virtual and erect.
The magnification of the lens is less than +1. This indicates that:
- Size of the Image is smaller than that of the object.
- The image formed by a concave lens is always virtual, erect and diminished.
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