Black

A black body is defined as a perfect absorber of radiations. It may or may not be a perfect emitter of radiations

• true

• false

Tags

NGSS.HS-PS4-3

Choose the correct statement of an ideal blackbody

• Emits 100% of the light it generates, but cannot absorb its own radiation

• Absorbs half of the light incident upon it and emits half of the radiation it generates

• Absorbs all light incident on it, or emits all of the radiation it generates

• Absorbs 100% of the light incident upon it, but cannot emit light of its own

Tags

NGSS.HS-PS4-3

What is black body radiation?

• Radiation emitted by a perfect reflector

• Radiation emitted by a perfect absorber

• Radiation emitted by a transparent body

• Radiation emitted by a coloured body

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which of the following is a property of black body radiation?

• It depends on the material of the body

• It depends on the temperature of the body

• It depends on the shape of the body

• It depends on the colour of the body

Tags

NGSS.HS-PS4-3

Which of these a part of a black hole?

• outer horizon

• horizon

• yellow star

• inner event horizon

Which of these is a part of a black hole?

• singularity

• plurality

• main event

• tiny event

What happens for a black hole to be created?

• someone pokes a hole in space

• a star runs out of fuel

What is a black hole before it becomes a black hole?

• a star

• a regular planet

• an asteroid

• a comet

What types of stars make black holes? (Select more than one)

• Red Dwarf

• Yellow Star

• Blue Giant

• Super Giant

How many steps of formation are there for black holes?

• 2

• 3

• 5

• 6