Which of the following brain waves helps indicate a calm state of mind?

Alpha waves are associated with a calm and relaxed state of mind, typically occurring when a person is awake but relaxed, such as during meditation or when daydreaming. They are present when the mind is alert yet not overly concentrated on a specific task, creating a balance between awareness and relaxation.

These brain waves oscillate at a frequency of 8 to 12 Hz and are often prominent when a person closes their eyes and begins to relax, indicating a transition from deeper states of consciousness to a more wakeful state. This makes alpha waves crucial for mental coordination, calmness, alertness, and even learning, as they enhance creativity and reduce anxiety.

Other brain wave types serve different purposes; beta waves are typically associated with active thinking and problem-solving, theta waves are linked with deep relaxation and sleep states, and delta waves are present during deep sleep, making them less relevant to a state of calm alertness.