Question

# Complete the following sentences :(a) If half part of a convex lens is covered, the focal length ............ change, but the intensity of image ...............(b) A convex lens is placed in water. Its focal length will ...........(c) The focal length of a then convex lens is .......... than that of a thick convex lens.

Solution

## (a) If half part of a convex lens is covered, the focal length does not change, but the intensity of image decreases.(b) A convex lens is placed in water. Its focal length will increase.(c) The focal length of a thin convex lens is more than that of a thick convex lens.Physics

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