Post-UTME Physics 2016 Objective — Question 5
Question 5 of 20 from the Post-UTME Screening (Post-UTME) Physics 2016 Objective paper, with the correct answer and a full explanation.
Advertisement
A ray of light travels up through a bucket of water of refractive index 1.33. If the angle of incidence is 50 degrees at the surface, the ray experiences
- A. total internal reflectionCorrect
- B. total refraction
- C. partial reflection
- D. partial refraction
Explanation
Critical angle = arcsin(1/1.33) = 48.8 degrees. Since the angle of incidence (50 degrees) exceeds the critical angle, total internal reflection occurs.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.