Optics - Lesson 1: Light

Multiple Choice

What did God create on the first day according to Genesis 1:3-5?

• Animals

• Light

• Plants

• Water

Multiple Choice

What are the two main ways that light is produced?

• Reflection and refraction

• Incandescence and luminescence

• Diffraction and interference

• Absorption and transmission

Multiple Choice

Which of the following is an example of artificial source of light?

• fluorescent

• star

• sun

Multiple Choice

Which of these are examples of ARTIFICIAL sources of light?

• Lightbulbs
• Neon signs
• Televisions
• ALL of them

Multiple Choice

What percentage of energy does an incandescent light bulb release as heat?

• 80%

• 90%

• 70%

• 60%

Multiple Select

Look at the last two questions. Suggest why modern bulbs are more efficient. (There is more than one correct answer)

• They do not need as big an energy input

• They are not as bright

• There is less wasted energy

• They release less heat.

Multiple Choice

What is the primary function of a light bulb?

• To produce light

• To generate heat

• To store energy

• To emit sound

Multiple Choice

What is the primary source of light in the image?

• A candle

• A lamp

• The sun

• A flashlight

Multiple Choice

What is luminescence?

• A process of producing light without heat

• A type of heating

• A method of sound production

• A form of energy storage

Open Ended

Why do glow sticks lose their light?

Multiple Choice

What is chemiluminescence?

• Light produced during a chemical reaction

• Light produced by electricity

• Light produced by friction

• Light produced by heat

Multiple Choice

What phenomenon is depicted in the image where the water glows blue?

• Bioluminescence

• Fluorescence

• Reflection

• Refraction

Multiple Choice

______ is the rapid movement of excess charge from one object to another.

• Electric discharge
• Static electricity
• Ohm's Law
• Electric Circuit

Open Ended

What is fluorescence and how does it work?

Multiple Choice

What is the main reason for using energy-efficient appliances?

• They are cheaper to buy

• They use more energy

• They reduce energy consumption

• They are larger in size