Sunrise from Mactan Island (Cebu, Philippines)
These lovely sunrise photographs were taken by Rebecca Obidos (Andre’s mom) during the early morning of October 23, 2010 from the small historic island of Mactan in Cebu, Philippines.
The camera used to take these pictures was a Canon PowerShot SX20 IS.
Sunrise is the time at which the leading limb of the Sun first rises above the horizon. The effect of refraction in the Earth’s atmosphere lifts the image of the Sun about half a degree at the horizon, making sunrise about two minutes earlier than would be expected from the actual position of the Sun in space. Refraction and the fact that sunrise and sunset are calculated from the limb (and not the center) slightly lengthen “day” relative to “night.”
The intense red and orange hues of the sky at sunrise and sunset are mainly caused by the scattering of visible light or white light from the sun by dust particles, soot particles, other solid aerosols, and liquid aerosols in the Earth’s atmosphere. This effect is called Rayleigh scattering.
During sunrise and sunset the distance that the light has to travel from the Sun to an observer is at its greatest. This means the a large amount of blue and violet light has been scattered so the light that is received by an observer is mostly of a longer wavelength and therefore appears to be red.
Sunrise colors are typically less brilliant and less intense than sunset colors, since there are generally fewer particles and aerosols in the morning air than in the evening air. Nighttime air is usually cooler and less windy, which allows dust and soot particles to settle out of the atmosphere, reducing the amount of scattering. The reduced scattering correspondingly reduces the amount of red and orange scattered light at sunrise.
I love sunsets and sunrise. 😀 As they mark the coming of a brand new day, for me, they always signify hope.