title: Emit event from parent to child
body: <p>I have a Submit<code>button in the parent component namely</code>personDetails<code>.</code>personDetails<code>has many</code>person` components. Whenever I click on the Submit button, I want to call a method in child component. </p>
  
  <p>How can I emit an event from a parent to a child component using <code>@Output</code>?</p>
  
  <p>Its easy to do it from the child to the parent. I want to access a value of the child component, hence I need to emit an event from parent to child.</p>