A lens is called a thin lens if its overall thickness is large.
Hence, the statement is false.
Which lens has more power : a thick lens or a thin lens ?
Complete the following sentences :
(a) If half of a convex lens is covered, the focal length ..................... change, but the intersity of image ......................
(b) A convex lens is placed in water. Its focal length will ..................
(c) The focal length of a thin convex lens is ............... than that of a thick convex lens.