What happens to incoming light rays that are parallel to the principal axis of a convex lens?

When an object is heated it contracts. a. true b. false

Ineed the answers for these promblems i have

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b