Illumination Quiz

What is the light and ray model of light?

• A model that represents light as a solid particle

• A model that represents light as a curved line

• A simplified model that represents light as a straight line called a ray, which travels in a straight line until it encounters a surface or medium that causes it to change direction.

• A model that represents light as a series of waves

What are luminous sources? Provide examples of luminous sources.

• Examples of luminous sources include rocks, water, and soil.

• Examples of luminous sources include the sun, light bulbs, and fireflies.

• Examples of luminous sources include clouds, snow, and rain.

• Examples of luminous sources include books, pencils, and paper.

Differentiate between natural and artificial luminous sources with examples.

• A candle is a natural luminous source, while a flashlight is an artificial luminous source.

• The sun is a natural luminous source, while a light bulb is an artificial luminous source.

• A lightning bug is a natural luminous source, while a streetlamp is an artificial luminous source.

• A campfire is a natural luminous source, while a smartphone screen is an artificial luminous source.

What are illuminated sources? Give examples of illuminated sources.

• Objects that reflect light

• Objects that absorb light

• Objects that emit light

• Objects that block light

Explain the difference between natural and artificial illuminated sources with examples.

• Natural illuminated sources are made of plastic, while artificial illuminated sources are made of metal.

• Natural illuminated sources are found in nature, while artificial illuminated sources are man-made.

• Natural illuminated sources are always brighter than artificial illuminated sources.

• Natural illuminated sources are only found indoors, while artificial illuminated sources are only found outdoors.

Classify the following objects into opaque, transparent, and translucent: glass, wood, and plastic.

• Glass: Transparent, Wood: Opaque, Plastic: Translucent

• Glass: Translucent, Wood: Opaque, Plastic: Transparent

• Glass: Opaque, Wood: Transparent, Plastic: Translucent

• Glass: Translucent, Wood: Transparent, Plastic: Opaque

Classify the following objects into opaque, transparent, and translucent: water, air, and metal.

• Water - transparent, Air - transparent, Metal - opaque

• Water - opaque, Air - translucent, Metal - transparent

• Water - opaque, Air - transparent, Metal - translucent

• Water - translucent, Air - opaque, Metal - transparent

What is the quantity of light? How is it measured?

• Degrees Celsius

• Miles per hour

• Lumens

• Kilograms

Explain the concept of luminous flux and its unit of measurement.

• Lux (lx)

• Candela (cd)

• Watt (W)

• Lumen (lm)