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1) A spherical mirror and a thin spherical lens have each a focal length of- 15 cm. The mirror and the lens are likely to be.
By Alice

1) A spherical mirror and a thin spherical lens have each a focal length of- 15 cm. The mirror and the lens are likely to be.
(a) Both concave.
(b) Both convex.​

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Alice

1) Define a class called student that has the following data members: – int student number – string student name – double student

A gas is found to have the formula (S2)X. It’s vapour density is 128. Find the value of X :-

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