Question

要把標(biāo)本放大450倍，如果選用10X的目鏡，則物鏡應(yīng)選用（ ）
A．10X
B．40X
C．45X
D．60X

Answer 1

【答案】分析：顯微鏡放大倍數(shù)等于物鏡放大倍數(shù)與目鏡放大倍數(shù)的乘積．所以物鏡的放大倍數(shù)就應(yīng)是顯微鏡放大倍數(shù)除以目鏡的放大倍數(shù)．
解答：解：通過分析已知要放大的倍數(shù)是600倍，目鏡放大倍數(shù)是10倍，而物鏡的放大倍數(shù)就應(yīng)是顯微鏡放大倍數(shù)除以目鏡的放大倍數(shù)，即450÷10═45（倍）．
故選C．
點(diǎn)評(píng)：只要牢記顯微鏡放大倍數(shù)等于物鏡放大倍數(shù)與目鏡放大倍數(shù)的乘積，這類題目就會(huì)迎刃而解．