Sound And Light Flashcards
0
Q
What do amplitude, frequency and wavelength mean?
A
The amplitude of a wave is its maximum disturbance from its undisturbed position.
The wavelength of a wave is the distance between a point on one wave and the same point on the next wave.
The frequency of a wave is the number of waves produced by a source each second. It is also the number of waves that pass a certain point each second.
1
Q
What causes sound?
A
Vibrations
2
Q
Name the primary and secondary colours of light.
A
Primary colours of light – red, green and blue.
Secondary – magenta, yellow and cyan.
3
Q
What happens when white light shines onto red filter?
A
All the white light is absorbed, but not the red light.
