Question

investigators measure the size of fog droplets using the diffraction of light. a camera records the diffraction pattern on a screen as the droplets pass in front of a laser, and a measurement of the size of the central maximum gives the droplet size. in one test, a 690 nm laser creates a pattern on a screen 30 cm from the droplets.

Answer 1

The investigators are using diffraction of light to measure the size of fog droplets by recording the diffraction pattern on a screen as the droplets pass in front of a laser. The central maximum of the diffraction pattern allows them to determine the droplet size. In this particular test, a 690 nm laser is used and the screen is located 30 cm from the droplets.

Step-by-step explanation:

The subject of this question is Physics.

The grade level for this question is High School.

Diffraction of light is a phenomenon that occurs when light encounters an obstacle or passes through a small opening. In this case, the investigators are using diffraction to measure the size of fog droplets. They pass the fog droplets in front of a laser, and a camera records the diffraction pattern on a screen. By measuring the size of the central maximum of the diffraction pattern, they can determine the size of the droplets.

In the test described, a 690 nm laser is used, and the diffraction pattern is recorded on a screen located 30 cm from the droplets.