Is the year 3539 and, on his 30th birthday, Albert leaves for a new job opening on the planet Zil. After saying goodbye to his twin brother Henry, Albert jumps in his
spacecraft and takes off for Zil traveling at a speed of 0.95c. The total trip takes 3.0
years according to the clocks on board Albert's spaceship. How old are Henry and
Albert when the three-year journey is complete. (Show work)!!

Please help ! I’ll mark brainliest

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.