Spontaneous emission

The transcript explains the process of spontaneous emission, where a photon of light is produced when an atom transitions from an excited state to a lower energy level. It highlights examples of spontaneous emission, such as light from fluorescent tubes, cathode ray tube televisions and monitors, and the Aurora borealis.

What happens during spontaneous emission?

• An atom splits into two smaller atoms.

• An atom remains in the same energy state without releasing a photon.

• An atom absorbs a photon and moves to a higher energy state.

• An atom releases a photon and transitions to a lower energy state.

Which of the following is a source of light due to spontaneous emission?

• LED lights

• Solar panels

• Fluorescent tubes

• Incandescent bulbs

What type of television technology relies on spontaneous emission?

• OLED TVs

• Plasma TVs

• LCD TVs

• Cathode ray tube TVs

Which natural phenomenon is an example of spontaneous emission?

• Volcanic eruptions

• Thunderstorms

• Aurora borealis

• Rainbows

What is the primary cause of light in the Aurora borealis?

• Spontaneous emission

• Refraction of light

• Reflection of sunlight

• Absorption of cosmic rays