Optics Quiz
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5 questions, one answer each
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1. What does the law of reflection state?
- A. Angle of incidence = angle of refraction
- B. Angle of incidence = angle of reflection
- C. Angle of reflection = critical angle
- D. Angle of incidence is always 90 degrees
2. What causes light to refract when passing from air into glass?
- A. A change in colour
- B. A change in the speed of the wave
- C. A change in wave amplitude
- D. A change in wave frequency
3. Total internal reflection occurs when the angle of incidence is...
- A. Less than the critical angle, going from a less dense to a denser substance
- B. Greater than the critical angle, going from a denser to a less dense substance
- C. Equal to 0 degrees
- D. Greater than 90 degrees always
4. A rough surface reflects light in many different directions. What is this called?
- A. Specular reflection
- B. Refraction
- C. Diffuse reflection
- D. Total internal reflection
5. A converging lens has a very short focal length compared to another converging lens. What can be said about its power?
- A. It has a lower power
- B. It has a higher power
- C. Power is unrelated to focal length
- D. Both lenses have equal power