Explain in brief
1. Advanced sunset
2. Delayed sunset
3. Twinkling of stars
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Answers
Answer:
Explanation:
Did you know that we actually see the sunrise about 2 minutes before the sun is actually at that perceived position and Did you know that the sunset that we see is actually of a sun that has, in reality, already set? So why these different perceptions? It is because of a phenomenon termed as refraction of light.
What is refraction of light? Simply put, a ray of light ‘bends’ when it travels from one medium to another. This ‘bending of light’ is called refraction of light. If the light ray travels from a rare medium to a denser medium, it bends towards the imaginary normal and if it travels from a dense medium to a rarer medium, it bends away from the imaginary normal. Depending on the density of the different medium, the speed of the travelling light ray keeps varying, and this causes it to slow down or speed up, therefore bending in the process.
Explain the terms
1: Advanced sunset
2: Delayed sunset
3: Twinkling of stars
Answer
1: Advanced sunset ➡️ Here in this case the sun is slightly below the horizon, here the light rays coming from the sun from the rarer to the denser medium ,it is because of atmospheric refraction of light ,so at higher position the light is appears above its horizon, so the sun appear earlier than actual sun rise
2: delayed sunset ➡️ Here refraction occurs at the sunset
3: Twinkling of stars ➡️ In this case the light which is coming from the star will get refracted before reaching it to the person who is watching,...here due to some changes occurring in the physical condition of the atmosphere,..the light rays of stars may or may not be reaching the eye of the observer this is twinkling of stars