Cahaya merah dan cahaya inframerah adalah dua jenis sinaran elektromagnet yang merupakan sebahagian daripada spektrum cahaya yang boleh dilihat dan tidak kelihatan., masing-masing.
Lampu merah ialah sejenis cahaya nampak dengan panjang gelombang yang lebih panjang dan frekuensi yang lebih rendah berbanding dengan warna lain dalam spektrum cahaya nampak.. It is often used in lighting and as a signaling device, such as in stop lights. In medicine, red light therapy is used to treat various conditions such as skin issues, sakit sendi, dan sakit otot.
Cahaya inframerah, sebaliknya, has a longer wavelength and higher frequency than red light and is not visible to the human eye. It is used in a variety of applications, such as in remote controls, thermal imaging cameras, and as a heat source in inductrial processes. In medicine, infrared light therapy is used for pain relief and to improve circulation.
Both red light and infrared light have unique properties that make them useful in various fields, from lighting and signaling to medicine and technology.
