Question

顯微鏡的總的放大倍數(shù)是100倍，已知所用的物鏡放大倍數(shù)是10倍，則目鏡的放大倍數(shù)是（　　）

A．90倍

B．10倍

C．20倍

D．5倍

Answer 1

分析：顯微鏡放大倍數(shù)=目鏡倍數(shù)×物鏡倍數(shù)

解答：解：顯微鏡放大的倍數(shù)是目鏡與物鏡的乘積，所以顯微鏡物鏡的倍數(shù)是10倍，要使顯微鏡放大100倍，目鏡應(yīng)該為10倍，即10×10=100倍．
故選B．

點評：解答的關(guān)鍵是理解顯微鏡的放大倍數(shù)=目鏡倍數(shù)×物鏡倍數(shù)．