In an electron micrograph of a plant cell, the distance across a starch grain is measured as 3.8 cm3.8\text{ cm}3.8 cm. The actual width of this starch grain is known to be 1.6×10−6 m1.6 \times 10^{-6}\text{ m}1.6×10−6 m.
Calculate the magnification used to produce this micrograph. Give your answer to 2 significant figures.
