How to get raycast working on 2d objects

Questions & Answers
1

So i have 2D game and i wrote this piece of code hoping that it will work on 2d objects and it isn’t. Not returning any log, but if i add a 3d cube it returns an log. Can someone could help me transform this script to work in 2d gamescene?

  Camera cam;
    void Start()
    {
        cam = Camera.main;
    }

    void Update()
    {
        if (Input.GetMouseButtonDown(0)) //checks left mouse button
        {
            Ray ray = cam.ScreenPointToRay(Input.mousePosition); //cast ray on whatever we click on
            RaycastHit hit;

            if (Physics.Raycast(ray, out hit))//if ray hits something, this happens
            {
                //destroy block in range
                Debug.Log(" hit" + hit.collider.name);
            }
        }
    }
2

void Update()
{
if ( Input.GetMouseButtonDown( 0 ) )
{
Vector2 worldPoint = Camera.main.ScreenToWorldPoint( Input.mousePosition );
RaycastHit2D hit = Physics2D.Raycast( worldPoint, Vector2.zero );
if ( hit.collider != null )
{
Debug.Log( hit.collider.name );
}
}
}