What causes reddening of starlight? explain how the reddish color of the sun’s disk at sunset is caused by the same process.

Dust grains interacting with starlight causes reddening by either the absorption or scattering of other colors and we only can see the reddening one because other colors have longer wavelength that we cannot see.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .