Avery small red laser pointer is pointed on the wall across the room. when inspecting the reddish light on the wall, you notice that it is because it has been diffracted. a) bent b) brighter c) spread out d) bounced back

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?