Light Quiz

What is the main source of light during the day?

• Fire

• Sun

• Stars

• Moon

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What would happen if there was no light from the sun?

• Earth would be dull

• Earth would be bright and warm

• Earth would be dark and cold

• Earth would be colorful

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Which type of energy is visible to humans?

• Sound energy

• Electrical energy

• Heat energy

• Light energy

How does light travel from its source?

• In circular lines

• In straight lines

• In curved lines

• In zigzag lines

What can solar panels convert radiant energy into?

• Heat energy

• Sound energy

• Electrical energy

• Mechanical energy

How long does it take for light to travel from the sun to Earth?

• 1 week

• 1 day

• 1 hour

• 8 minutes and 20 seconds

What is the speed of light compared to sound?

• Light and sound cannot be compared

• Light is slower than sound

• Light is faster than sound

• Light and sound travel at the same speed

What is the purpose of fiber-optic cables?

• To reflect light

• To send information using light

• To generate electricity

• To slow down light

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How thin is a fiber-optic cable compared to a strand of hair?

• Much thinner

• Slightly thinner

• The same thickness

• Thicker

What can light be used for in communication?

• Sending emails

• All of the above

• Making phone calls

• Watching TV

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