Advertisements
Advertisements
प्रश्न
Explain in brief the reason for the following :
Advanced sunrise
उत्तर
Advanced sunrise
Sun is seen about two minutes before the actual sunrise because of refraction of sunlight through the atmosphere. When the Sun is just below the horizon, sunlight enters the Earth's atmosphere obliquely and gets refracted through the different layers of the atmosphere. As a result of this, sunlight gets bent and reaches the eyes of an observer. Following the path of light rays entering the eyes, the observer sees the Sun slightly above its actual position. As a result of this, Sun is seen about two minutes before the actual sunrise. 
APPEARS IN
संबंधित प्रश्न
Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.
Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.
Which light has the longer wavelength : red light or blue light?
What is meant by dispersion of white light? Describe the formation of rainbow in the sky with the help of a diagram.
Name some everyday objects:
which reflect all the colours in sunlight
Which of the two is scattered more easily, light of shorter wavelengths or light of longer wavelengths?
Explain why, when the sun is overhead at noon, it appears white, but when the same sun is near the horizon at sunset, it appears red.
The clouds are seen white. Explain
A beam of blue, green, and yellow light passes through the earth's atmosphere. Name the colour which is scattered the least.
The clear sky appears blue because
