A ray of light that the police shine when there has been an incident on the road
14%
A ray of light that is leaving the surface of a mirror
59%
A ray of light that is hitting the surface of a mirror
9%
A ray of light that is shining parallel to the surface of a mirror
Q.2.
Electromagnetic radiation travels in straight lines, so how come certain radio waves can be detected on the other side of the world without using artificial satellites?
31%
Earth's gravity causes them to bend round
31%
They reflect off a layer in the Earth's atmosphere
25%
They can pass directly through the Earth
12%
When they get to the edge of the atmosphere they are trapped by space
Q.3.
A solar furnace can be used to cook food in sunny places where it is difficult to obtain other fuels. It works by reflecting and focussing the Sun's heat. What would be the best shape and material for a solar furnace?
18%
Flat, dark and matt
47%
Concave, light colored and shiny
24%
Convex, light colored and matt
12%
Flat, gray and shiny
Q.4.
A sound wave hits a brick wall at 36 from the normal. At what angle does it reflect?
27%
126o
13%
63o
13%
54o
47%
36o
Q.5.
When you look at yourself in a mirror, your image is:
11%
real and identical to you
22%
virtual and identical to you
22%
real and laterally inverted
44%
virtual and laterally inverted
Q.6.
Which of the following statements about reflection is true?
21%
Echoes only occur in the countryside
64%
The angle of incidence is the same as the angle of reflection
7%
The normal is drawn as a dotted or dashed line on ray diagrams
7%
Rough surfaces scatter sound in all directions
Q.7.
The location of a virtual image in a plane mirror appears to be where?
83%
The same distance behind the mirror as the object is in front
17%
The same place as the object
0%
Behind the mirror but at half the distance of the object
0%
Behind the mirror but at twice the distance of the object
Q.8.
What is a virtual image?
27%
An image that can be projected onto a screen
45%
An image that can't be projected onto a screen
18%
An image that is virtually perfect
9%
An image of a person only
Q.9.
A hiker shouts to their friend and 4 seconds later hears an echo of their shout. If sound travels at 330 m/s, how far away was the cliff that reflected their shout?
17%
At least 2 km
17%
About 1.5 km
8%
Exactly 1,320 m
58%
660 m
Q.10.
On ray diagrams, what is the normal?
45%
An imaginary line at 90o to the reflecting surface
18%
An imaginary line at 45o to the reflecting surface
27%
A real line at 90o to the reflecting surface
9%
A real line at 180o to the reflecting surface
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