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P6: Quiz 4 – Answers
P6: Quiz 4 – Answers
1)
a) The waves can be absorbed, transmitted or reflected
b) Absorbed – a phone screen absorbing infrared radiation when it is left outside in the sun
Transmitted – light passing through a glass block from air
Reflected – light being reflected by a mirror, or sound being reflected off of walls (echoes)
There are loads of examples of each of these
2)
a) Two good examples are:
c) The normal is an imaginary line that is perpendicular (at 90°) to the surface that is doing the reflecting. The normal is also the line where the incident ray (the ray hitting the surface) and the reflected ray (the ray coming away from the surface) travel along the same path/ line
d)
i) B is the angle of incidence
ii) A is the angle of reflection
a) The waves can be absorbed, transmitted or reflected
b) Absorbed – a phone screen absorbing infrared radiation when it is left outside in the sun
Transmitted – light passing through a glass block from air
Reflected – light being reflected by a mirror, or sound being reflected off of walls (echoes)
There are loads of examples of each of these
2)
a) Two good examples are:
- Light being reflected by a mirror
- Sound waves being reflected off of a wall/ hard surface (echoes)
c) The normal is an imaginary line that is perpendicular (at 90°) to the surface that is doing the reflecting. The normal is also the line where the incident ray (the ray hitting the surface) and the reflected ray (the ray coming away from the surface) travel along the same path/ line
d)
i) B is the angle of incidence
ii) A is the angle of reflection
Questions
1)
a) What are the three things that can happen to waves at the boundary between two materials.
b) Give an example of each of the three things that can happen to waves at the boundaries between two materials.
2)
a) Give two places/ examples of where reflection of waves takes place.
b) What is the law of reflection?
c) Define the normal with respect to reflection.
d) The diagram below shows a light ray being reflected.
1)
a) What are the three things that can happen to waves at the boundary between two materials.
b) Give an example of each of the three things that can happen to waves at the boundaries between two materials.
2)
a) Give two places/ examples of where reflection of waves takes place.
b) What is the law of reflection?
c) Define the normal with respect to reflection.
d) The diagram below shows a light ray being reflected.
The incident ray, reflected ray, normal and two angles (A and B) are shown on the above diagram.
i) Out of angles A and B, which angle is the angle of incidence?
ii) Out of angles A and B, which angle is the angle of reflection?
i) Out of angles A and B, which angle is the angle of incidence?
ii) Out of angles A and B, which angle is the angle of reflection?