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| Pregunta | Respuesta |
| How does light travel? | In straight lines |
| Approximately how fast does light travel? | About 300,000 k/s |
| What is faster, Light or Sound? | Light is almost 1 million times faster than Sound (Light = 300,000 and Sound = 0.34). This is why we SEE Fireworks before we HEAR them. |
| Why do we see things? | Because light reflects into our eyes. |
| What is a Luminous object? | It is an object which produces light. |
| What is a Non-Luminous object. | A Non - Luminous object is one that reflects light. |
| What is a Non-Luminous object. | A Non - Luminous object is one that reflects light. |
| What are shadows? | Shadows are places where light is blocked. |
| What is the normal? | The normal is an imaginary line that is 90 degrees from the surface. |
| What is the incident ray? | The incident ray is the ray of light that comes from the source |
| What is the Angle of Incidence? | The angle of incidence in the angle between the Incidence ray and the Normal. |
| What is the Reflection Ray? | The reflection ray is the ray of light reflected off an object. |
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