How to Stop Light in Its Tracks

The video explores the concept of light speed, highlighting its constancy in a vacuum and variations in different mediums. It delves into the groundbreaking ability to slow and even freeze light using electromagnetically induced transparency, a phenomenon first observed in 1991. The process involves using lasers to manipulate energy levels in atoms, creating a 'dark state' where light can pass through a previously opaque medium. This technology has potential applications in quantum computing and cryptography, offering a way to store complex quantum information. Despite challenges, advancements like IBM's chip show promise for future developments.

What is the speed of light in a vacuum?

• 1,000,000 meters per second

• 300,000,000 meters per second

• 300,000 meters per second

• 150,000,000 meters per second

What is the key technique used to make an opaque medium transparent?

• Electromagnetically induced transparency

• Photon entanglement

• Laser diffraction

• Electromagnetic radiation

What happens to electrons in a 'dark state'?

• They move to a higher energy level

• They emit photons

• They absorb photons from both beams

• They do not absorb photons from either beam

How do light waves behave when they enter a medium and slow down?

• They disappear completely

• They speed up and spread out

• They slow down and interfere with each other

• They maintain the same speed

What is one potential application of stopping light?

• Increasing internet speed

• Improving solar panel efficiency

• Enhancing digital photography

• Advancing quantum computing

What challenge is associated with using ultra-cold atoms for stopping light?

• High energy consumption

• Scalability issues

• Increased environmental impact

• Limited availability of materials

Which company developed a chip that could slow light by a factor of 300?

• Intel

• Google

• Microsoft

• IBM