Answer: n 2 sin(theta2).
- A n<sub>2</sub> sin(theta2)
- B n<sub>2</sub> cos(theta2)
- C n<sub>1</sub> sin(theta2)
- D n<sub>2</sub> tan(theta2)
Correct answer: A. n<sub>2</sub> sin(theta2)
Explanation: Snell's law: n<sub>1</sub> sin(theta1) = n<sub>2</sub> 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.