An "Experimental Apparatus" refers to the collection of tools and equipment used to conduct scientific experiments. This setup can include items like test tubes, beakers, microscopes, and thermometers, which help researchers observe and measure various phenomena. The design of the apparatus is crucial for obtaining accurate and reliable results. The configuration of the experimental apparatus varies depending on the specific experiment being conducted. It may involve complex systems, such as spectrometers for analyzing light, or simpler setups for basic experiments. Proper assembly and calibration of the apparatus are essential to ensure that the data collected is valid and reproducible.