The picture shows the moment a bullet passed through an apple captured by a high-speed camera. After the photo was enlarged, it was analyzed that during the exposure time, the bullet image before and

The picture shows the moment a bullet passed through an apple captured by a high-speed camera. After the photo was enlarged, it was analyzed that during the exposure time, the bullet image before and after the

The length of the bullet is about 5cm; then the distance the bullet flies is s=1%×5cm=5×10-4m;

Then the exposure time of the photo is t=sv=5×10 ?4m500m/s=1×10-6s;

So choose B.