light sources

What is a light source? (Remembering)

• 1. An object that emits light
• 2. An object that absorbs light
• 3. An object that reflects light
• 4. An object that refracts light

What is the difference between luminous and non-luminous sources of light? (Understanding)

• 1. Luminous sources produce their own light, while non-luminous sources do not
• 2. Non-luminous sources produce their own light, while luminous sources do not
• 3. Luminous sources emit light in all directions, while non-luminous sources emit light in one direction only
• 4. Luminous sources emit visible light, while non-luminous sources emit invisible light

Which type of light source produces its own light? (Remembering)

• Luminous
• Non-Luminous
• Diffuse
• Specular

What is the name of the phenomenon where light bounces off a surface? (Remembering)

• Reflection
• Refraction
• Diffraction
• Interference

How does a fluorescent light bulb produce light? (Understanding)

• 1. By using a fluorescent coating that emits light when excited by electrons
• 2. By heating a filament until it glows
• 3. By using a high voltage electric discharge through a gas to produce light
• 4. By using a laser to create a beam of light