a lens is made by attaching together two watch glasses with their concave faces towards each other. radius of curvature of each surface is 20 cm. if the lens prepares contains air and is immersed in water, it behaves as
1.which type of lens either converging or diverging?
2.what is the focal length of it?
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Answer:
converging,10cm
Explanation:
it is because convex lens are converging lens ,formula (f=r/2
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