A 6.5 cm needle is placed 15 cm away from a convex mirror of focal length 19 cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.
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Answer:
Distance of object from the mirror ( u ) = 12 cm .
Distance of image from the mirror ( v ) = ?
Focal length ( f ) = 15 cm .
Lens formula
As we move farther the image will be diminished as the lens is convex lens .
ANSWER :
v = 6.67 cm .
Explanation :
In a convex lens :
u is always negative .
f is always positive .
Hence the lens formula gets altered a bit and we can find the distance by using the magnification formula also .
We know that the convex lens has negative magnification and hence it always diminishes the image .
Thus the nature will be diminished .
Explanation:
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