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Water is wonderful for reflections!
Waves - Reflection 01
Reflection happens when waves bounce off a surface instead of passing through it. Use this quiz to practise ray diagrams and examples like mirrors and road signs.
1 .
What will all waves do when they are incident, at a certain angle, on surfaces that do not allow the waves to pass through?
Diffuse
Reflect
Disappear
Change amplitude
They bounce off the surface in a predictable way
2 .
A ray of light reflects from a plane mirror with an angle of reflection of 64 degrees. What was its angle of incidence?
36 degrees
26 degrees
64 degrees
154 degrees
Remember the law of reflection
3 .
Which of the following statements are true?
The reflected ray and the incident ray are on opposite sides of the normal
The incident ray, the reflected ray and the normal all lie in the same geometric plane
The angle of incidence is equal to the angle of reflection
All of the above
This is why reflection is so predictable
4 .
A ray of light is shone onto a plane mirror with an angle of incidence of 32 degrees. What is the angle between the reflected ray and the normal?
68 degrees
32 degrees
58 degrees
122 degrees
The angle of incidence is always measured between the ray and the normal line
5 .
Which type of surface would provide the best reflection?
Rough
Smooth
Jagged
They all reflect as well as each other
A polished smooth surface would be even better!
6 .
What is the normal?
It is a line perpendicular to the light source
It is a line parallel to the reflecting surface at the point of incidence
It is a line perpendicular to the reflecting surface at the point of incidence
It is a line parallel to the light source
It is a construction line, in other words, it is a line drawn to help with calculations of reflection (and refraction)
7 .
What is the law of reflection?
Angle of incidence = Angle of reflection
Angle of incidence < Angle of reflection
Angle of incidence > Angle of reflection
Angle of incidence = The normal
A wave will always reflect off a surface at the same angle at which it hit
8 .
What are properties of images produced by plane mirrors?
Virtual
Upright
Laterally inverted
All of the above
Pepper's ghost relies on these properties. If you haven't heard of this look it up in a physics book or online
9 .
What is an incoming ray of light called?
Reflected ray
Normal
Incident ray
Ray Charles
In the study of waves, incident always indicates something to do with the incoming wave
10 .
Which of the following devices uses the principle of reflection?
Newtonian telescope
Fibre optic cables
A mirror
All of the above
Reflection of light is very useful indeed!
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