CLEAN : Mexican ex-governor makes first appearance in Guatemala court

The video introduces the concept of mass and explores the idea of a sonic mirror, providing a brief overview of these topics.

What is the primary focus of the initial discussion in the video?

• The speed of sound

• The theory of relativity

• The nature of light

• The concept of mass

Which of the following best describes a sonic mirror?

• An optical illusion

• A type of musical instrument

• A device that reflects sound waves

• A tool for measuring mass