If you've enabled the HTML5 history API functionality in AngularJS using
$locationProvider.html5Mode(true)
you will probably notice that when you refresh the page in a browser, you get a 404. This is because you've lost the # bookmark, so the browser is requesting a page on your server which doesn't exist.
To fix this in Apache, create a .htaccess file in the root of your AngularJS app and paste the following in:
# If the request is a file, folder or symlink that exists, serve it up
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.+)$ - [S=1]
# otherwise, serve your index.html app
RewriteRule ^(.+)$ /index.html