Physics
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

LUV > lIR > lVIS
LUV > lVIS > lIR
LUV < lIR < lVIS
LUV < lVIS < lIR

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Physics
Why does the sea appear blue in colour?

Reflection of the sun light from water surface
Refraction of the sun light
Scattering of the sunlight by water molecules
Interference of the sun light from water surface

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