Reflection and refraction Quiz
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5 questions, one answer each
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1. A ray hits a plane mirror with an angle of incidence of 35°. What is the angle between the reflected ray and the mirror?
- A. 35°
- B. 70°
- C. 55°
- D. 145°
2. Which statement about the image in a plane mirror is correct?
- A. It is virtual and laterally inverted
- B. It is real and upside down
- C. It is real and magnified
- D. It is virtual and upside down
3. Light goes from air into water. What happens to its speed and direction?
- A. It speeds up and bends towards the normal
- B. It slows down and bends away from the normal
- C. It stays the same speed and does not bend
- D. It slows down and bends towards the normal
4. Light goes from air into a plastic with i = 40° and r = 25°. What is n?
- A. 0.66
- B. 1.52
- C. 1.60
- D. 0.69
5. What must be true for total internal reflection?
- A. The angle of incidence is less than the critical angle
- B. The light is going from air into glass
- C. The angle of incidence is greater than the critical angle, and the light is going towards a less dense material
- D. The angle of incidence is 0°