What is the velocity of light as it moves from air to diamond.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

What are similarities and differences of reflection, refraction, diffraction and absorption?

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?