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Reflection of Light
Contribué par: Wang
  • 1. The diagram shows a single ray of light being directed at a plane mirror. What is the angle of incidence and angle of reflection?
A) Angle of incidence = 40o, angle of reflection = 50o
B) Angle of incidence = 50o, angle of reflection = 50o
C) Angle of incidence = 50o, angle of reflection = 40o
D) Angle of incidence = 40o, angle of reflection = 40o
  • 2. Which one of the following is WRONG about the laws of reflection?
A) The angle of incidence is equal to the angle of reflection.
B) The incident ray and the reflected ray lie on the same plane.
C) The incident ray and the normal lie on the same plane.
D) The laws of reflection can be applied to the plane mirror only.
  • 3. A boy stands at the side of a girl in front of a large plane mirror. They are both the same distance from the mirror as shown in the diagram. Where does the boy see the girl’s image?
A) C
B) D
C) A
D) B
  • 4. Which one of the following is not the characteristics of the image formed by a plane mirror?
A) Has the same size as the object
B) Upright
C) Real
D) Laterally inverted
  • 5. A man 1.8 m tall wishes to see his full length in a plane mirror. The minimum length of mirror that he must buy is
A) 1.5 m
B) 1 m
C) 0.9 m
D) 1.8 m
  • 6. A boy is running at a speed of 5 m/s towards a plane mirror. The boy and his image in the mirror are moving
A) away from each other at a speed of 10 m/s
B) towards from each other at a speed of 5 m/s
C) away from each other at a speed of 5 m/s
D) towards each other at a speed of 10 m/s
  • 7. A piece of tin foil is crumpled by a boy. Why is the surface of the crumpled foil not as shiny as before?
A) This is because light is not reflected but absorbed by the tin foil.
B) This is because light is reflected in different directions after striking the surface.
C) This is because specular reflection occurs.
D) This is because light is reflected in the same direction after striking the surface.
  • 8. A boy sits in an optician’s chair, looking into a plane mirror, which is 2m away from him, and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be?
A) 4.5 m
B) 5 m
C) 1 m
D) 2.5 m
  • 9. A man is viewing an image produced by a periscope made of two mirrors. What type of image will be seen by the man?
A) Real, inverted and not laterally inverted.
B) Virtual, upright and not laterally inverted.
C) Virtual, upright and laterally inverted.
D) Real, upright and laterally inverted.
  • 10. Which of the following is correct about the characteristics of the image formed in a convex mirror?
A) Virtual, upright and diminished
B) Virtual, upright and magnified
C) Real, inverted and has the same size as the object
D) Real, inverted and diminished
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