Given the question: Q: What do you call a device that produces a very focused beam of visible light of just one wavelength and color? Read this paragraph and choose the correct option from the provided answers: Did you ever see a cat chase after a laser light, like the one in Figure below ? A laser is a device that produces a very focused beam of visible light of just one wavelength and color. Waves of laser light are synchronized so the crests and troughs of the waves line up. The diagram in Figure below shows why a beam of laser light is so focused compared with ordinary light from a flashlight. Choices: - optical diffuser - fusion relay - light meter - laser A:
The answer is:
laser