A group of students performed an experiment to investigate various properties of a vibrating string, including: the tension on the string, the wave speed, the wave
amplitude, the wave frequency, and the wavelength. They were able to keep some
properties constant, while changing others and taking accurate measurements. In the
first experiment, the students changed the amplitude of the vibrating string, while
keeping the wavelength and the string's tension constant, and measured the resulting
wave speed and frequency. The results are shown in the table below. How is
amplitude related to the other properties of a vibrating wave?
Amplitude A
Ten sion
Speed v Frequency f Wavelength &
(mm)
(N)
(m/s)
(Hz)
1
5
300
200
1.5
2
5
300
200
1.5
- to
3
5
300
200
1.5
TITT
No

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.