The Doppler effect refers to the phenomenon where the frequency of sound changes when the sound source is moving.

In psychology, there is a phenomenon called the suspension bridge effect, which refers to people misattributing the cause of their arousal.

He experienced the Urashima effect due to space travel.

The special theory of relativity is a theory proposed by Einstein.

Learning about the ancient special kana usage is very important for understanding ancient Japanese.

The Jōdai Tokushu Kanazukai is one of the notation methods of ancient Japan.

Reducing greenhouse gas emissions is important for environmental protection.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

We need to evaluate the cost-effectiveness of this project.

We need to evaluate the cost-effectiveness of this project.