Question

Explain with reason :-
a) Twinkling of stars.
b) Advanced sunset and delayed sunrise.
c) Blue colour of sky.
d) Reddish colour of sky during sunrise and sunset.

Answer 1

Stars twinkle because-

1) Of the turbulence's in our atmosphere like presence of wind, various gases molecule, different temperature region etc.

Advanced sunset and delayed sunrise-

1) Due to atmospheric refraction of the light emitted by the sun.

Blue color of sky-

1) As per fundamental colors of R(red) G(green) B(blue) , the color blue has the shortest wavelength thus scatters in all direction by the molecules present in the atmosphere thus making the color of sky blue.

Reddish colour of sky during sunrise and sunset-

1)The sunlight consists of seven colors (VIBGYOR) out of which only the color red does not scatters totally, because the intensity of the color red is higher than the rest of VIBGYOR color, hence making the only color visible to human eyes.