Echo

The transcript explains the concept of echoes, which are repetitions of sound or other wave energy. It highlights that echoes are not limited to sound but can also include light echoes, as observed by astronomers. These light echoes occur when light from energetic events is reflected off clouds of dust and gas.

What is an echo primarily associated with?

• Light

• Sound

• Heat

• Electricity

Besides sound, what other forms of energy can create echoes?

• Nuclear energy

• Chemical reactions

• Wave energy

• Magnetic fields

What do astronomers observe when they study light echoes?

• Reflections of magnetic fields

• Reflections of heat waves

• Reflections of light from energetic events

• Reflections of sound waves

In the context of astronomy, what do light echoes reflect off?

• Solid planets

• Clouds of dust and gas

• Metal surfaces

• Water bodies

Which of the following is NOT a type of echo discussed in the video?

• Heat echo

• Sound echo

• Light echo

• Wave echo