Understanding Quantum Dots

Quantum dots are tiny semiconducting nanocrystals made from elements like silicon and cadmium compounds. They range from 2 to 10 nanometers in size and can absorb and emit light, with the color depending on their size and material due to quantum confinement. This effect is akin to different-sized bells producing different sound energies. Larger quantum dots emit redder light, while smaller ones emit bluer light. Quantum dots have applications in medical research, solar panels, televisions, and lighting.

What are quantum dots primarily made of?

• Organic compounds

• Metal alloys

• Semiconducting nanocrystals

• Plastic polymers

How does the size of a quantum dot affect the color of light it emits?

• Larger dots emit bluer light

• Smaller dots emit redder light

• Larger dots emit redder light

• Size does not affect the color

What is the principle that explains the color emission of quantum dots?

• Quantum entanglement

• Quantum tunneling

• Quantum confinement

• Quantum superposition

In which of the following fields are quantum dots NOT used?

• Medical research

• Solar panels

• Automobile engines

• Televisions

Which of the following is a correct application of quantum dots?

• Used in traditional incandescent bulbs

• Applied in solid-state lighting

• Utilized in mechanical watches

• Employed in fossil fuel extraction