Understanding Light and Materials

What is the primary function of light for humans?

• To enable vision

• To provide warmth

• To create sound

• To generate electricity

Which of the following is NOT a natural source of light?

• Sun

• Fire

• Bulb

• Torch

How fast does light travel?

• 300,000 kilometers per hour

• 300,000 kilometers per second

• 300 kilometers per second

• 300 kilometers per hour

Which type of material allows some light to pass through but not clearly?

• Transparent

• Reflective

• Translucent

• Opaque

What type of material allows all light rays to pass through, enabling clear vision?

• Reflective

• Transparent

• Translucent

• Opaque