A light microscope is being used to view two membranes separated by $200\,\text{nm}$. When the objective lens is switched from low power to high power $(\times 400)$, what is the distance between the membranes?
- A$2\,\mu\text{m}$
- B$20\,\mu\text{m}$
- C$200\,\text{nm}$
- D$2000\,\text{nm}$