infrapunavalguse

Infrapunavalgus, also known as infrared radiation, refers to a type of electromagnetic radiation with wavelengths longer than visible light but shorter than microwave radiation. It falls within the range of approximately 700 nanometers to 1 millimeter on the electromagnetic spectrum, though definitions can vary depending on context. Infrared radiation is invisible to the human eye but can be detected as heat, as it is primarily perceived through thermal sensations.

The term "infrapunavalgus" is derived from the Latin *infra* (meaning "below") and the Estonian word *punavalgus* (meaning "red light"), highlighting its position just below the visible red spectrum. Infrared radiation is naturally emitted by objects due to their thermal energy, a phenomenon described by Planck's law of black-body radiation. Common sources include the sun, fire, and even human bodies, which emit infrared radiation as a result of their temperature.

Infrapunavalguse has numerous practical applications. In remote controls, infrared signals are used to transmit data wirelessly between devices. Thermal imaging cameras detect infrared radiation to create images based on heat signatures, useful in military, medical, and industrial fields. Astronomy also relies on infrared observations to study celestial objects obscured by dust in visible light. Additionally, infrared spectroscopy is employed in chemistry and materials science to analyze molecular structures.

While generally harmless in low doses, excessive exposure to concentrated infrared radiation can cause thermal burns or eye damage. Safety measures, such as protective gear and proper ventilation, are often necessary in industrial or laboratory settings where high-intensity infrared sources are used.