Mood ring

A mood ring is a ring that contains a thermochromic element, typically liquid crystal, that changes color based on the wearer's body temperature. The color change is purported to reflect the wearer's emotional state, as body temperature can fluctuate with emotional arousal.

Mechanism

The thermochromic liquid crystals in a mood ring react to heat by twisting, which alters their molecular structure and, consequently, the wavelengths of light they absorb and reflect. This change in reflected light manifests as a change in color. The ring does not directly detect "mood," but rather uses skin temperature as an indirect indicator. Factors other than emotional state, such as ambient temperature, illness, or exercise, can also affect skin temperature and thus the ring's color.

Interpretation of Colors

While the specific color interpretations can vary between manufacturers, a common interpretation scheme links colors to emotional states. For example:

• Black: Stressed, tense, anxious
• Gray: Stressed, uneasy, nervous
• Amber/Brown: Unsettled, apprehensive, mixed emotions
• Green: Normal, average, relaxed
• Blue/Green: Calm, relaxed
• Blue: Happy, loving
• Dark Blue/Purple: Passionate, romantic
• Purple/Violet: Happy, content

History and Popularity

Mood rings were invented in 1975 by Maris Ambats, a New York inventor. They quickly gained popularity in the 1970s as a novelty item and fashion accessory. Although their popularity has fluctuated over time, they remain a recognizable cultural icon and are still available for purchase.

Criticisms

The accuracy of mood rings in reflecting emotional states is widely disputed. Critics point out that skin temperature is influenced by a multitude of factors, making it an unreliable indicator of emotions. Mood rings are generally considered to be a novelty item rather than a reliable emotional gauge. The interpretations of colors are also considered subjective and vary widely.