Answer: n2 sin(theta2).
- A n2 sin(theta2)
- B n2 cos(theta2)
- C n1 sin(theta2)
- D n2 tan(theta2)
Correct answer: A. n2 sin(theta2)
Explanation: Snell's law: n1 sin(theta1) = n2 sin(theta2). Relates angles of incidence and refraction at a boundary.
Concave mirror ray construction: a ray parallel to the axis reflects through F, and a ray through F reflects parallel, locating the inverted real image. Image: Maxmath12, CC0, via Wikimedia Commons.
Concept context
Reflection, refraction, lenses, mirrors, total internal reflection.