Question

) Give reasons for the following:
(i) The sky appears to be blue during day time to a person on earth.
(ii) The sky near the horizon appears to have a reddish hue at the time of sunset and
sunrise.
(iii) The sky appears dark instead of blue to an astronaut.
(iv) The stars appear to twinkle.
(v) The planets do not twinkle.​

Answer 1

Answer:

(I) due to scattering of light

(II) because red colour has more wavelength than other colours so, it is least scatter by light

(iii)due to absence of scattering of light

(iv)due to atmospheric refraction

(v)due to atmospheric refraction

Answer 2

Answer:

(i)because water of oceans reflect by sunlight and the reflected lite colors becomes blue so it appears blue