Early Sunrise and Late Sunset
Early Sunrise and Late Sunset
Early Sunrise and Late Sunset: Consider an oblique ray from a heavenly body such as the sun or a star.
While travelling through the atmosphere, it continuously moves into regions of higher refractive indices continuously bends towards the normal, resulting in a path similar to that shown in the figure. Since we see an object in the direction of the ray incident on the eye, the atmospheric refraction makes a heavenly body appear higher than its actual position. |  |
Consider the situation when the sun just below the horizon as in the figure. Rays of light coming from it get bent such that to an observer they seem to be coming from above the horizon. Thus, even when the sun's position is just below the horizon, the sun is visible to us. So, at sunrise we see the sun before it actually comes to the horizon. And at sunset we see it even after it has just dipped below the horizon. This increases daylight by about four minutes every day (two minutes at sunrise and two minutes at sunset). |  |
You might have noted that the sun looks oval at sunrise and sunset. As you can see from the figure, the rays from the lower regions of the sun travel a greater distance through the atmosphere than those from the upper regions. So, they bend more. As a result, the image of the lower region gets shifted upwards more than that of the upper region. This makes the sun appear like a flattened circle, or an oval.
The sun looks oval at __________________ . | |||
| Right Option : C | |||
| View Explanation | |||
Which phenomenon explains the reason behind 2 minute early sunrise and 2 minute delay sunset ? | |||
| Right Option : A | |||
| View Explanation | |||
Sun appears to rise early because of _____________________. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
