Waec Physics Past Questions For Year 1996
Question 26
The graph above shows the relationship between sin i and sin r for a ray of light in air incident on a liquid surface. If i and r are respectively angles of incidence and refraction, deduce the refractive index of the liquid from the graph
- A. 1.63
- B. 1.50
- C. 1.33
- D. 1.25
- E. 0.08
Question 27
A boy walks away from a plane mirror at a speed of 3 ms-1 in a direction normal to the surface of the mirror. At what speed is his image approaching him?
- A. 8 9.0ms-1
- B. 6.0ms-1
- C. 4.5ms-1
- D. 1.5ms-1
- E. 0.0ms-1
Question 28
A ray of light strikes a plane mirror at a glancing angle of 50o. Calculate the angle between the incident and reflected rays
- A. 20o
- B. 40o
- C. 50o
- D. 80o
- E. 100o.
Question 29
In which of the following media would sound waves travel fastest?
- A. Kerosine
- B. Alcohol
- C. Water
- D. lron
- E. Air
Question 30
Which of the following instruments produces sound by the vibration of air column?
- A. Piano
- B. Guitar
- C. Flute
- D. Hand bell
- E. Talking drum
