What have you learned about how scientists talk about systems? What makes something a system?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

How does an observation about an object differ from an inference about that object