Human Head Model, Frontal and Median Section Light & Optics_Spectroscopy Length-adjustable wooden pendulum simple-machine model

Length-adjustable wooden pendulum simple-machine model with a blue bob sliding along the string and a wooden guide keeping the swing on a consistent path for period-vs-length measurements

this model removes a brain half to expose the cortical surface

providing a quick swap-in reference for general-purpose AC-circuit and timing-experiment work

5-inch compact and 6-inch long-format units

Life-size head cross-section exposes cranial vault

Human Head Model, Frontal and Median Section Light & Optics_Spectroscopy Length-adjustable wooden pendulum simple-machine modelFrontal and median head sections expose brain, cranial sinuses, oral cavity, and cervical spine across the same model for comprehensive head anatomy teaching.