[" 2.Name two effects produced by the atmospherk nefin "],[" 3.Which phenomenon makes us see the sun's "],[" (a) a few minutes before actual sunrise? "],[" (b) a few minutes after actual sunset? "],[" A.Atmospheric refraction causes advance sunrise and "],[" (a) sunrise advanced? "],[" (b) sunrise advanced? "],[" (b) sunrise advanced? "],[" (b) sunrise advanced? "],[" (b) sunrise advayed? "],[" (b) sunset delayed? "],[" 5.State whether the following statement is true or fals."]