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- 1. Multiple Choice
why do we see flashes before we hear the sounds?
light travels faster than sound
light travels slower than sound
- 2. Multiple Choice
Which is translucent?
x
y
z
- 3. Multiple Choice
Which is opaque?
x
y
z
- 4. Multiple Choice
1. Which material is best at reflecting light: metal or glass?
metal
glass
- 5. Multiple Choice
1. Light hits a plane mirror with an angle of incidence of 20o. What will the angle of reflection be?
20
30
10
- 6. Multiple Choice
1. The diagram shows a ray of light from a fly to a fish. The fish can see the fly.
What happens to the direction of the ray of light as it enters the water?
A) It bends towards the normal.
B) It is reflected deeper into the water.
C) It bends away from the normal.
D) It bends down into a less dense material.
- 7. Multiple Choice
What happens to the speed of the ray as it enters the water?
increases
decreases
- 8. Multiple Choice
Which colours are reflected by Man's trousers on the left side of the diagram?
All colours
Red
- 9. Multiple Choice
Which colours are reflected by the body on the left side of the diagram?
all colours
none
- 10. Multiple Choice
On the right side, which colour is reflected by the trouser?
All colours
none
only red
- 11. Multiple Choice
Which colour is reflected by the hat on the right side?
none
blue
all colours
- 12. Multiple Choice
Which is a cornea and focus the light?
J
F
G
H
- 13. Multiple Choice
Which is the iris and controls the amount of light entering the eye by changing the size of the pupil?
G
H
F
E
- 14. Multiple Choice
How is a translucent material different from a transparent material?
A translucent material transmits light.
A translucent material absorbs all light.
A translucent material absorbs some light and the rest is reflected.
A translucent material scatters light as it passes through.
- 15. Multiple Choice
A student puts a red filter in a beam of white light.
(a) What happens to the light that hits the filter?
Red light is transmitted and all the other colours are absorbed.
Red light is absorbed and all the other colours are transmitted.
White light is transmitted and red light is absorbed.
Red light is reflected and all the other colours are absorbed.
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