Reflection
When light goes from a less dense medium such as air to a more dense medium such as water, does the light refract towards the "normal line" or away?
What is towards the "normal line"
What causes the light to bend (refract) when going from one medium to another?
What is change in speed
Why does a green laser pointer pop a black balloon but won't pop a green or white balloon
What is the black balloon absorbs the light energy converting it to thermal energy. The green and white balloon reflect the green light.