Quick Recap of $scope

$scope.$emit fires an event up to the parent $scopes.

$scope.$broadcast fires an event down the $scope.

Using $scope.$on we can listen for these events.

$rootScope – The Problem Statement

$rootScope has no $parent, hence using an $emit for most obvious reasons seems pointless.

However,  a $rootScope.$emit(ted) event can only

be caught by  $rootScope.$on listeners and not by $scope.on listeners.

On the other hand, $rootScope.$broadcast will notify all $rootScope.$on and $scope.$on listeners

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