Light sources

The video explains the darkness of deep-sea environments and introduces bioluminescence, a rare ability of certain animals like copypods to produce their own light. It discusses how copypods use light for communication and defense. The concept of light sources is defined, with examples such as fires, flashlights, and the sun. The video also clarifies the difference between objects that emit light and those that merely reflect it, like mirrors and water surfaces.

What unique ability does the animal in the deep sea possess?

• It can swim very fast.

• It can produce its own light.

• It can change colors.

• It can live without oxygen.

How do copypods use their light?

• To attract mates.

• To communicate and confuse predators.

• To navigate in the dark.

• To find food.

Which of the following is considered a light source?

• A diamond.

• A flashlight.

• A glass of water.

• A mirror.

What is the main difference between light sources and reflectors?

• Both reflect light but at different angles.

• Both emit light but at different intensities.

• Reflectors emit light, while light sources only reflect light.

• Light sources emit light, while reflectors only reflect light.

Which of the following is NOT a light source?

• The sun.

• A burning candle.

• A street lamp.

• A shiny gem.