Jquery find div is hidden - Applies to all html controls

<div id="divFather" style="display: none;">

</div>

<div id="divSon">

</div>

How to find whether the div is hidden or visible?

Solution that works is below:

var isFatherDivVisble = $("#divFather").is(":visible");

            //returns false

var isSonDivVisble = $("#divSon").is(":visible");

            //returns true