A planet has been observed orbiting a nearby star. This star has a mass of 3. 5 solar masses, and the planet is 4. 2 AU from the star. What is the planet’s orbital period in Earth years? Round your answer to the nearest whole number. Earth years.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.