Exploring the Blackest Black

What makes the $2 million diamond nearly invisible?

• It is covered with a black cloth.

• It is made of transparent material.

• It is placed in a dark room.

• It is coated with a nano material that absorbs light.

Why do deep-sea fish have ultra-black skin?

• To generate heat.

• To avoid being seen by predators.

• To reflect sunlight.

• To attract mates.

How do deep-sea fish absorb almost all light?

• By having transparent skin.

• By using reflective scales.

• By having a dense layer of pigment granules.

• By emitting their own light.

What is the main difference between pigments and carbon nanotubes in creating ultra-black materials?

• Pigments are more expensive than nanotubes.

• Pigments reflect light, while nanotubes absorb it.

• Pigments are used in clothing, while nanotubes are not.

• Pigments absorb light, while nanotubes trap it.

What percentage of light do the blackest carbon nanotube coatings trap?

• 99.995%

• 100%

• 99.95%

• 99.4%

Why do birds of paradise have ultra-black feathers?

• To scare away predators.

• To enhance their mating displays.

• To absorb heat from the sun.

• For camouflage in the forest.

How do the ultra-black feathers of birds of paradise affect their appearance?

• They make the birds invisible.

• They create a stark contrast with bright colors.

• They make the birds look larger.

• They reflect sunlight to attract mates.

What is the primary purpose of the ultra-black feathers in birds of paradise?

• To blend in with the environment.

• To store food.

• To attract mates through visual contrast.

• To keep warm in cold climates.

What has inspired human technology in creating ultra-black materials?

• The scales of reptiles.

• The feathers of birds of paradise.

• The structure of human skin.

• The shells of crustaceans.

What is the purpose of the PBS survey mentioned in the conclusion?

• To announce a contest.

• To promote a new show.

• To sell merchandise.

• To gather feedback on the video.