3.14-3.29 light & sound Flashcards
1
Q
what type of waves are light rays?
A
transverse
2
Q
what is the law of reflection?
A
angle of incidence=angle of reflection
3
Q
how to calculate refractive index
A
refractive index = sin(angle of incidence) / sin(angle of reflection
)
4
Q
what is total internal reflection
A
Used to transmit signals along optical fibres.
5
Q
how do you calculate critical angle?
A
sin (critical angle) = 1 / refractive index
6
Q
what type of waves are sound waves?
A
longditudinal
7
Q
what is the frequency range for human hearing?
A
20-20,000 Hz
8
Q
which part of an oscilliscope measures a sound wave?
A
the microphone
