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Nature's Wonders - Optical Phenomenon
 
item Sun dogs hovering over Hong Kong 
item The mysterious glory 
item Colours of Clouds 
item Triple rainbow 
item Echoes of the rainbow 
item What is Cerenkov Radiation? 
item In-depth anatomy of the atmospheric optical phenomenon - "Sun dog" 
item Why is candlelight yellow and gas-grill light blue? 
item  What are primary colours?
item  Why do stars twinkle?
item  What is the colour of water?
item  Which is darker - coarse sand or fine sand?
item  Why are spectacles or camera lens so difficult to clean?
item  Red Eye and 'Glory'
item  Why do breaking waves appear white?
item  Why does wet sand look darker than dry sand?
item  Obscured hills - why is a distant hill less distinct than a near one?
item  Why is the sky blue?
item  What causes a rainbow?
item  Why is the region outside the primary rainbow much darker than that inside the primary rainbow?
item The Hong Kong Observatory provides sky images (Solar halo on 8 May 2002)
item What is "Halo"? (Solar Halo on 5 March 1998)

 
 2003 | Important notices | Privacy policy Last revision date: <15 Dec 2011>