Stars appear to be twinding but planets do not twinkle. Why?
Explain why the colour of the clenr sky during day appears blue and
during sunset appears red
Answers
Answer:
As we know plantes are much more smaller then stars ...stars twinkle becoz the light comes from a point and there are present many small particles in the atmosphere through which light deflected .and stars appers to be twinkle ..bt this same do not happen with the planets as they as far away frm the earth .as they have much more distance frm the earth their light can't comes to the eath surface and we don't see the planet twinkling.
as we know that white colour is the mixture of all seven colours ..when white light comes the sky it splits into seven colours .red colour have very high wave lenght which can easily comes to the earth's surface bt blue colour have very low wave lenght which can't reach to the surface of earth nd scattered in the sky and appers as blue to our eyes.
Reason for twinkling of Stars :-
=>It is caused by Atmospheric refraction. Atmospheric refraction is bending of light caused by earth's atmosphere.
=>Earths Atmosphere is changing Continously.
=>When the light of the stars Come from space towards us the continously changing earth atmosphere Refracts(Bends) the light By different amount an in different directions in every moment.
=>When the Atmosphere refract more starlight to us the star appears Bright.
=>When the Atmosphere refract Less starlight to us the star appears Dim.
#Reason for not twinkling of Planets :-
=>Planets are relatively closer to earth than Stars.
=>Planet are closer to sun Appears to Bigger they Don't have their own light.
=>Each point on planet act as a source of light and Nullifies each other action's.
=>On whole planets are near Bigger. No light of their own nullifies Each other Light Effects
Hence, planets not twinkle.
#Reason Colour of sky during day appears blue :-
=>It is because of scattering of light in the atmosphere.
=>Our atmosphere is consists of tiny nitrogen and Oxygen Particles.
=>When the sunlight consists of 7 colours enters in the atmosphere. It hits the nitrogen and Oxygen Particles. It scatters Blue and voilet Light as compared to other lights.
=>Hence,the blue light enters our eyes so the sky appears blue During the day.
#Reason Colour of sky during sunset appears red :-
=>During, the Sunsets the Sunlight must travels a Greater Distance. So, it hits more Particles.
=>Thus, Blue and Voilet light Disappears before they reach our eyes & the less scattered light Comes in the Atmosphere & gets scattered .
=>Hence,Colour of sky during sunset appears red