NASA | SDO Catches Surf Waves on the Sun

The video explores the Kelvin-Helmholtz (KH) instability, a phenomenon where two fluids flow past each other at different speeds or densities, forming wave patterns. This instability is observed in clouds, water waves, and notably in the sun's atmosphere. The Solar Dynamics Observatory has recorded KH waves during coronal mass ejections, providing insights into how these waves transfer energy and heat the sun's corona. Despite initial skepticism about the sun's magnetic field preventing KH waves, models confirm their formation. Understanding these waves aids in developing better solar models and predicting solar activity.

What is a key characteristic of Kelvin-Helmholtz instability?

• It is only observed in water waves.

• It occurs when two fluids with the same speed flow past each other.

• It is a phenomenon exclusive to the sun.

• It involves two fluids flowing past each other at different speeds or densities.

How do KH waves contribute to the sun's atmosphere?

• They stabilize the sun's magnetic field.

• They prevent solar flares.

• They help in heating the sun's corona.

• They cool down the sun's surface.

What role does the Solar Dynamics Observatory play in studying KH waves?

• It prevents the formation of KH waves.

• It measures the temperature of the sun's core.

• It captures images of KH waves during coronal mass ejections.

• It monitors the Earth's atmosphere.

Why was additional evidence needed to support the observation of KH waves on the sun?

• Because KH waves were only theoretical.

• Because the sun's atmosphere is too cold for KH waves.

• Because KH waves were never observed on Earth.

• Because the sun's magnetic field was thought to prevent KH waves.

What is the significance of understanding KH waves in solar research?

• It helps in predicting solar activity and improving solar models.

• It allows for the creation of artificial solar flares.

• It reduces the sun's magnetic field.

• It increases the sun's gravitational pull.