Light Concepts

What is a source of light that occurs naturally?

• Sun

• Fire

• Stars

• Moon

Explain what a shadow is and how it is formed.

• Shadows are only visible during the day.

• A shadow is formed when an object blocks light, creating a dark area behind it. The shadow is the shape of the object blocking the light.

• Shadows are created by objects absorbing light.

• A shadow is formed by the reflection of light on a surface.

Give an example of artificial light.

• Incandescent light bulb

• LED light bulb

• Candle flame

• Sunlight

Describe the process of reflection of light.

• Reflection of light changes the color of the light

• Reflection of light occurs when light is absorbed by a surface

• The process of reflection of light involves light bouncing off a smooth surface at the same angle it hits the surface.

• Reflection of light involves light passing through a surface

How can you differentiate between transparent, translucent, and opaque objects?

• You can taste them to determine their transparency

• You can listen to them to identify their opacity

• You can smell them to differentiate between transparent, translucent, and opaque objects

• To differentiate between transparent, translucent, and opaque objects, you can shine a light through them. If the light passes through completely, it is transparent. If only some light passes through, it is translucent. If no light passes through, it is opaque.

Provide an example of a natural source of light.

• Sunlight

• Starlight

• Firelight

• Moonlight

What happens to light when it passes through a transparent object?

• It disappears

• It changes color

• It continues to travel in a straight line.

• It reflects back

How does refraction of light occur?

• Light speed increases when passing through a medium

• Refraction occurs due to the bending of light waves

• Light changes direction when it passes from one medium to another with a different optical density.

• Light changes color when passing through a medium