Light Fact 1: Light is a form of energy (energy is the ability to make things change),
Fact 2: it travels in a wave OR? In a particle form called a “photon,” which is a bundle of energy.
Fact 3: Light travels in a straight line and Fact 4: obeys the Law of Reflection Angle of incidence = Angle of reflection In other words, light gets reflected from a surface at ____ _____ angle it hits it. The same !!!
When not reflected… What ever cannot be reflected is absorbed. This makes objects appear black This makes objects get hot – What are some examples?
Fact 5: Light not only reflects, but also refracts (Refracts: when energy bends as it passes through something) Why? Light passing through a block of ice
Fact 6: Light is fast. Speed of light in air is 300,000,000 m/sec Speed of sound in air is only 340 m/sec
At this speed it can go around the world 8 times in one second.
Shadows Fact 7: Shadows are places where light is blocked, absorbed and reflected, by something in the way Rays of light
Quick Quiz 1.True or False: Light is slower than sound. 2.When waves bounce off of something it is called _____________? 3.The additive colors of light are _________, __________, and ___________. 4.When light is ___________ it converts from light energy to heat.